Chapter 16
Anselm, Abelard, and Medieval Atonement Theology

Introduction: Why the Middle Ages Matter

When most people think about the Middle Ages, they picture castles and knights, not careful theological arguments about why Jesus had to die. But for anyone who wants to understand substitutionary atonement — really understand it, not just repeat a slogan — we need to spend some serious time in the medieval period. The reason is simple: two of the most important and influential proposals about the meaning of Christ's death were forged in the fires of medieval debate. One came from Anselm of Canterbury, a brilliant Italian monk who became the archbishop of England. The other came from Peter Abelard, a dazzling French philosopher-theologian whose life was as dramatic as his ideas. Together, their arguments set the stage for everything that followed — including the Reformation's formulation of penal substitutionary atonement.

The thesis I want to argue in this chapter is this: the medieval period produced two of the most influential atonement proposals in Christian history — Anselm's satisfaction theory and Abelard's moral influence theory — and understanding both is essential for appreciating how substitutionary atonement developed as both a continuation of and improvement upon Anselm's insights. Anselm got something profoundly right: the atonement must deal with something real and objective in God's own nature. Abelard also got something right: the cross is a breathtaking display of divine love that transforms those who contemplate it. But neither thinker, taken alone, captures the full biblical picture. It was left to later theologians — especially Thomas Aquinas in the medieval period and then the Reformers — to take Anselm's core insight, correct its weaknesses, and develop it in a more explicitly penal and substitutionary direction. Understanding how this happened is essential for anyone who wants to think clearly about what Christ accomplished on the cross.

We will also examine the contributions of Thomas Aquinas, who produced the most comprehensive medieval synthesis of atonement theology, and Hugo Grotius, whose governmental theory offered yet another alternative. By the end of this chapter, we should have a clear picture of the theological landscape from which the Reformation understanding of substitutionary atonement emerged.

The World Anselm Inherited

To appreciate what Anselm accomplished, we need to understand what came before him. As we explored in Chapters 13–15, the early church fathers held a rich and multi-layered understanding of the atonement. Christus Victor themes — Christ's victory over sin, death, and the devil — were pervasive. Substitutionary language appeared alongside victory themes in many of the fathers, as we documented in Chapter 15. But the dominant way that the cross was explained in popular preaching and theological writing for much of the first millennium involved some version of the ransom theory: the idea that humanity was held captive by the devil, and Christ's death was the price paid to secure our release.

Some versions of this ransom theory were carefully stated and theologically responsible. Others, frankly, were not. Gregory of Nyssa's famous image of God baiting a fishhook with Christ's humanity to catch the devil — luring Satan into seizing someone he had no right to — struck many later theologians as unworthy of God. The idea that God owed the devil anything at all, or that God would use deception as His primary method of redemption, seemed problematic. As Gustaf Aulén acknowledged in his landmark study, these ransom theories, while containing a genuine kernel of truth about Christ's victory, were "set forth in a naïve, pictorial manner" that invited criticism.¹

It was into this context that Anselm stepped with a work that would reshape atonement theology forever.

Anselm of Canterbury (1033–1109): The Man and His Masterwork

Anselm was born in Aosta, Italy, in 1033. He entered the Benedictine monastery at Bec in Normandy, eventually becoming its abbot. In 1093, following the Norman Conquest, he was appointed archbishop of Canterbury — a position he held with distinction despite frequent conflicts with the English crown. He has been called the father of medieval scholasticism, the intellectual movement that sought to reconcile faith and reason, biblical revelation and philosophical inquiry. His famous motto, fides quaerens intellectum — "faith seeking understanding" — captures his approach perfectly. Anselm was not trying to replace faith with logic. He was a deeply devout monk and pastor whose love for God drove him to think as clearly and carefully as he could about the deepest truths of the Christian faith.²

Fleming Rutledge makes an important point about Anselm that is often missed by his critics: we should read him "first as an artist, even as a storyteller, and only then as a thinker."³ Anselm's theology was not a dry, abstract exercise. It was born from prayer, pastoral concern, and deep faith. Those who read his devotional writings discover a man of remarkable warmth and tenderness — not the cold logician his detractors often caricature.⁴

His great work on the atonement, Cur Deus Homo? (literally, "Why the God-Man?"), written around 1098, is structured as a dialogue between Anselm and a monk named Boso. The dialogue format gives the work a lively, conversational quality that we might not expect from an 11th-century theological treatise. Boso asks probing questions. He pushes back. He raises objections that anticipate the very criticisms modern readers bring to Anselm. And Anselm responds with a chain of reasoning that, even a thousand years later, retains remarkable power.

The Argument of Cur Deus Homo

Anselm's argument proceeds through a series of carefully linked steps. I want to walk through each one, because understanding the internal logic is essential for evaluating both his strengths and his weaknesses.

Step 1: The Gravity of Sin

Anselm begins with a profound diagnosis of the human problem. Sin, for Anselm, is not merely breaking a rule. It is "not rendering to God what is his due" (Cur Deus Homo 1.11).⁵ What do we owe God? The complete submission of our will to His. Every rational creature owes God total obedience, total love, total devotion. When we withhold this — when we take from God what rightfully belongs to Him — we dishonor Him. We steal from Him. As Stott summarizes, "To sin is ... to 'take away from God what is his own,' which means to steal from him and so to dishonor him."⁶

This is Anselm's famous refrain, directed at anyone who treats sin lightly: nondum considerasti quanti ponderis sit peccatum — "you have not yet considered the seriousness of sin." Aulén notes that this phrase becomes the "continual refrain" of the whole work, the foundation on which everything else is built.⁷ The gravity of sin is measured not by the act itself but by the One against whom it is committed. An offense against an infinitely great and holy God requires an infinitely great response.

Step 2: The Impossibility of Simply Letting Sin Go

Can God simply forgive sin by a bare act of will, without any satisfaction? Anselm says no. "It is not proper for God to pass by sin thus unpunished" (1.12).⁸ If sin is simply ignored, if there is no reckoning, no reparation, then the moral order of the universe is undermined. God's honor — which, as we will see, really means His righteousness and justice — would be compromised. "It is not within the scope of his liberty or kindness or will to let go unpunished the sinner who does not repay to God what he has taken away" (1.12).⁹

Rutledge powerfully brings this home to modern readers. We understand this instinctively when we think about the worst injustices of our world — genocides, child abuse, human trafficking. No sane person would say that these horrors should simply be passed over, forgotten, swept under the rug. "A society of impunity is intolerable."¹⁰ If there is to be a moral order, justice must be done and must be seen to be done. Anselm's insistence on this point resonates with our deepest moral intuitions.

Step 3: Humanity's Dilemma — Unable to Pay

Here the problem deepens. Anselm argues that human beings owe God a debt they cannot pay. Our present obedience cannot make up for our past rebellion, because obedience is already owed to God — it is not surplus that can be applied to old debts. "One who is a sinner cannot justify another sinner" (1.23).¹¹ The debt is infinite because it is owed to an infinite God, and no finite creature can provide infinite satisfaction. Book one of Cur Deus Homo ends with this devastating conclusion: "Man the sinner owes to God, on account of sin, what he cannot repay, and unless he repays it he cannot be saved" (1.25).¹²

There is something deeply Pauline about this diagnosis, even if Anselm expresses it in categories Paul would not have used. Paul declares that "all have sinned and fall short of the glory of God" (Romans 3:23 ESV) and that "the wages of sin is death" (Romans 6:23 ESV). The human predicament is real and desperate. We are both needy (unable to restore what we owe) and unjust (unwilling to submit our wills fully to God). As Rutledge observes, Anselm's description of humanity as "both needy and unjust" captures a universal truth: "we are all capable of injustice and we are all living on the edge of neediness at any time."¹³

Step 4: Only a God-Man Can Satisfy the Debt

This is the heart of the argument and the answer to the title question: Why did God become man? Anselm reasons: "There is no-one ... who can make this satisfaction except God himself.... But no-one ought to make it except man; otherwise man does not make satisfaction. Therefore, it is necessary that one who is God-man should make it" (2.6).¹⁴

The logic is elegant: Only God can provide an infinite satisfaction. Only a human ought to provide it, since it is humanity that owes the debt. Therefore, only a being who is both God and man — the God-man, Jesus Christ — can bridge the gap. Christ's voluntary self-offering in death provides a satisfaction of infinite value because of the infinite dignity of His person. Since Christ was sinless, He owed no debt of His own. His death was purely voluntary, purely generous, purely gratuitous. "The life of the God-man was so good, so exalted and so precious that its offering in death 'outweighs the number and greatness of all sins'" (2.14).¹⁵

Step 5: This Is Not Necessity — It Is Grace

One of the most common criticisms of Anselm is that he makes the atonement a matter of cold logical necessity, as though God were trapped by some external law that forced Him to act. But Anselm himself anticipates this objection — through the mouth of Boso, who asks whether God is "compelled" to save humanity. Anselm's answer is remarkable: "When one does benefit from a necessity to which he is unwillingly subjected, less thanks are due him, or none at all. But when he freely places himself under the necessity of benefiting another, and sustains that necessity without reluctance, then he certainly deserves greater thanks for the favor. For this should not be called necessity but grace" (2.5).¹⁶

This is a crucial passage. Anselm is not describing mechanical necessity but ontological necessity — something that flows from God's own gracious nature, which He cannot deny because He will not deny Himself. God's character is such that He will not allow His creation to be destroyed by sin. "It is altogether foreign from his character to suppose that he will suffer that rational existence utterly to perish" (2.4).¹⁷ The "necessity" of the atonement, for Anselm, is rooted in the overflow of divine love and goodness, not in a cold legal calculus.

Evaluating Anselm: Strengths and Contributions

I believe Anselm's contribution to atonement theology is immense, and many of his core insights remain permanently valid. Let me highlight his most important achievements.

First, Anselm grounded the necessity of the atonement in God's own nature. The cross is not an arbitrary divine decision. It is not merely one option among many. Something in God's character — His holiness, His justice, His righteousness — demanded a response to human sin that mere amnesty could never provide. This insight is profoundly biblical. As we explored in Chapter 3, God's love, justice, and holiness are not competing attributes but complementary perfections. Anselm saw this with remarkable clarity.

Second, Anselm moved decisively beyond the ransom-to-the-devil theories. He rejected the idea that God owed anything to the devil. "God owed nothing to the devil but punishment" (2.19).¹⁸ The debt of sin is owed to God, not to Satan. This was a major theological advance that cleared the ground for a more biblically grounded understanding of the cross.

Third, Anselm emphasized the objective dimension of the atonement. Something real happened at the cross that addressed the problem of sin before God. The atonement is not merely a subjective experience in the heart of the believer. It is an objective accomplishment — a satisfaction of something in God's nature that makes forgiveness possible. This objectivity is essential to any adequate understanding of the cross, and it is precisely what the moral influence theory (as we shall see with Abelard) tends to lose.

Fourth, Anselm insisted on the absolute seriousness of sin. In an age when many people treat sin lightly — as mistakes, as weakness, as the result of bad circumstances — Anselm's thundering nondum considerasti remains a prophetic word. Sin is not trivial. It is cosmic rebellion against the Creator. And until we grasp this, we will never understand why the cross was necessary.

Evaluating Anselm: Weaknesses and Limitations

For all his brilliance, Anselm's presentation has real limitations that later theologians would need to address. I want to be fair to Anselm here — many of the criticisms leveled against him are based on caricatures rather than careful reading — but genuine weaknesses remain.

First, the "honor" framework is culturally conditioned. Anselm's whole argument revolves around the restoration of God's offended "honor." While Anselm means something deeper than wounded pride — as Rutledge correctly notes, we may substitute "righteousness" for "honor" and do no violence to his argument¹⁹ — the language inevitably reflects the feudal culture of his time, where social relationships were structured around honor and obligation. Stott acknowledges this limitation: "When God is portrayed ... in terms reminiscent of a feudal overlord who demands honor and punishes dishonor, it is questionable whether this picture adequately expresses the 'honor' which is indeed due to God alone."²⁰

Second, Anselm's model lacks the explicitly penal dimension. Anselm speaks of satisfaction, not punishment. In his framework, Christ provides a positive compensating gift to God's honor rather than bearing the judicial penalty for sin. There is an "either/or" in Anselm: either satisfaction or punishment. Christ provides satisfaction so that punishment is unnecessary. But the biblical data — especially passages like Isaiah 53:5 ("he was pierced for our transgressions"), 2 Corinthians 5:21 ("God made him who had no sin to be sin for us"), and Galatians 3:13 ("Christ redeemed us from the curse of the law by becoming a curse for us") — suggests something more than the offering of a compensating good. These texts speak of penalty-bearing, of curse-absorbing, of sin-carrying. Anselm's satisfaction model, while capturing a genuine dimension of the atonement, does not fully account for this penal language. As Allen observes, the later development of penal substitutionary atonement "took Anselm's core insight (the atonement must satisfy something in God's nature) but reframed it in terms of justice and law rather than honor and satisfaction."²¹

Third, the relationship between the Incarnation and the Atonement becomes somewhat strained. Aulén makes a penetrating observation here. In the patristic vision, the Incarnation and the Atonement are organically connected: God enters the world of sin and death to overcome the enemies that hold humanity captive. The logic flows naturally. But for Anselm, the connection is more indirect: a suitable human being must be found to offer acceptable satisfaction to God, and the Incarnation provides such a person.²² As Aulén puts it, "It is essential to the theory of Anselm that the Incarnation and the Atonement are not organically connected together, as they were in the classic view."²³ This is a real weakness. The early church fathers had a more integrated vision in which God Himself enters creation to accomplish redemption from within — a vision that is arguably more faithful to the Johannine and Pauline witness.

Fourth, the Christus Victor dimension is significantly muted. Anselm explicitly repudiates the old ransom-to-the-devil imagery, and while he occasionally speaks of Christ's victory over the devil, these references are, as Aulén notes, "purely accidental" — they have "no vital relation to the structure of his thought."²⁴ The triumphant note that characterized early Christian preaching — Christ the Victor who conquers sin, death, and the powers of evil — is dampened in Anselm's framework. The biblical picture requires both: Christ satisfies divine justice and defeats the powers of evil (as argued in Chapter 21 on Christus Victor).

Fifth, the concept of transferred merit is problematic. Anselm's idea that Christ's surplus merit can be credited to sinful humanity draws on the medieval penitential system in ways that go beyond what Scripture teaches. The New Testament does not speak of "merit" in connection with the atonement. As Allen rightly notes, "It should be noted, however, that the NT does not speak of merit in connection with the atonement."²⁵ The Reformers would later replace this merit-based framework with a more explicitly forensic and substitutionary one.

The Relationship Between Anselm and Penal Substitutionary Atonement

How exactly does Anselm's satisfaction theory relate to the penal substitutionary atonement that the Reformers would later develop? This is one of the most important questions in historical theology, and getting it right matters a great deal.

As we explored in Chapter 15, substitutionary language was already present in the church fathers, even if it had not been systematized into a formal "theory." Anselm took a major step forward by insisting that the atonement must address something in God's nature — specifically, His "honor" (better understood as His righteousness). But Anselm's model presents an either/or: either satisfaction or punishment. Christ provides satisfaction, which makes punishment unnecessary.

The Reformers — and the later Thomistic tradition — took Anselm's core insight and reframed it. Instead of honor needing to be restored, it is justice that needs to be satisfied. And justice is satisfied not by the offering of a compensating good (surplus merit) but by the bearing of the actual penalty of sin. Christ does not merely pay a debt of honor; He bears the curse, absorbs the judgment, and suffers the consequences that were due to us because of our sin. This is the crucial move from satisfaction theory to penal substitution.

I think Ben Pugh captures the relationship well when he asserts that Anselm's Cur Deus Homo "should be viewed as more post-patristic than proto-Reformed."²⁶ Anselm is not simply an early version of Luther or Calvin. He stands in his own historical moment, drawing on both patristic and medieval categories. But the line of development from Anselm to the Reformers is real and important. As we will see in Chapter 17, the Reformers built on Anselm's foundation while correcting his limitations — and the result was a more biblically faithful and theologically robust understanding of substitutionary atonement.

Anselm Reconsidered: A Fairer Reading

Before we move on to Abelard, I want to note that many modern criticisms of Anselm are unfair. It has become standard fare to accuse Anselm of casting God as a petty feudal lord obsessed with His own privileges. But this is a caricature. Rutledge argues persuasively that Anselm's use of "honor" should not be read through the lens of medieval feudalism alone. God's "honor," for Anselm, is really His righteousness — the moral integrity of His character and the moral order of His creation. "We may substitute the word 'righteousness' for 'honor' and do no violence to Anselm's argument."²⁷

Furthermore, Anselm himself is clear that God is not concerned merely for His own honor in a selfish way. He writes: "No one can ... dishonor God as he is in himself; but the creature, as far as he is concerned, appears to do this when he ... opposes his will to the will of God" (1.15, emphasis in original).²⁸ In other words, God does not need to defend His own honor. It is for the sake of the creature — for our sake — that sin must be dealt with. This is a point of immense importance that is frequently overlooked.

R. Hermann has also argued that Anselm's close association of creation and atonement shows that what is at stake is the restoration of the impaired order of creation — not the soothing of a wounded ego. God, as the ultimate author of the plan of salvation, takes the initiative. It is wrong, Hermann insists, "to speak of a change in God's attitude" as a result of Christ's work.²⁹ While Aulén pushes back against Hermann's reading (arguing that Anselm still fundamentally presents the atoning work as something accomplished by Christ as man, from below, rather than as God's own act from start to finish³⁰), the important point is that Anselm is more nuanced, more pastoral, and more profound than his critics typically allow.

Perhaps Rutledge's most telling observation about Anselm concerns his understanding of punishment. In his Monologium, Anselm defines "eternal punishment" as "inconsolable need."³¹ This is not the language of a theologian in love with the idea of retribution. It is the language of a pastor who understands that separation from God is the ultimate human tragedy. Anselm was not a harsh or vengeful thinker. He was a man of deep compassion who recognized that the human predicament required a divine solution.

Engaging the Objection: Can God "Freely Forgive" Without Satisfaction?

Before we move on to Abelard, we should engage directly with a powerful objection to Anselm's framework that continues to resonate today, including in William Hess's recent critique in Crushing the Great Serpent. The objection goes something like this: Anselm claims that God cannot simply cancel the debt of sin without receiving some form of satisfaction or payment. But doesn't Jesus Himself teach us to forgive freely? Doesn't the parable of the unforgiving servant (Matthew 18:23–35) depict a king who simply cancels an enormous debt out of compassion? If God tells us to forgive as He forgives — freely, without demanding payment — then isn't Anselm contradicting the very ethic Jesus taught?⁵⁸

Hess presses this point sharply: "The idea that God demands payment from mankind, incarnate or otherwise, to forgive them their trespasses or to reconcile with them flies in the face of what Christ Himself told us to do."⁵⁹ He further argues that if God requires satisfaction before He can forgive, this seems to create an "arbitrary despotism" where what counts as just is "inconsistent and capricious."⁶⁰

This is a fair challenge, and I want to take it seriously. But I think it misunderstands what Anselm is actually saying — and what the biblical picture actually teaches. Let me explain why.

First, the parable of the unforgiving servant is about how we should relate to one another — not about the metaphysical mechanics of how God deals with sin at the cosmic level. Jesus' parables use earthly analogies to make spiritual points, but no parable is meant to be a complete systematic theology of the atonement. The king in the parable is gracious, yes — but the parable itself ends with the unforgiving servant being "delivered to the jailers" until he pays everything he owes. If we pressed the parable as a complete theology, we would have to conclude that God revokes forgiveness — which raises its own serious theological problems. The point of the parable is the imperative of mercy and forgiveness in human relationships, not a denial that God's justice requires a reckoning with sin.

Second, the biblical picture as a whole does not present forgiveness as something that costs God nothing. Hebrews 9:22 declares, "Without the shedding of blood there is no forgiveness of sins" (ESV). The entire Levitical sacrificial system — which we explored in Chapters 4 and 5 — was built on the principle that atonement for sin requires a costly, substitutionary offering. The New Testament consistently presents Christ's death as the ground on which forgiveness becomes possible: "In him we have redemption through his blood, the forgiveness of our trespasses, according to the riches of his grace" (Ephesians 1:7 ESV). Forgiveness is indeed "free" to us — but it was enormously costly to God. It is grace, not cheap grace.

Third, there is a crucial difference between interpersonal forgiveness between human beings and the forgiveness that a righteous judge or moral governor extends to lawbreakers. When I forgive someone who has wronged me personally, I absorb the cost myself and release the debt. But God is not only a loving Father; He is also the righteous ruler and judge of the universe. He has established a moral order in which sin has real consequences. For God to simply wave away those consequences, as though they did not matter, would undermine the very moral order on which the universe rests. This is precisely Anselm's point — and it is a point that the biblical witness about God's holiness, justice, and righteousness strongly supports.

Now, here is where I think Anselm's framework can be improved. The beauty of the biblical picture is that God does not demand satisfaction from someone else while standing at a distance. He provides the satisfaction Himself, in the person of His Son. This is the point that Stott makes so powerfully with his concept of "the self-substitution of God" (developed fully in Chapter 20). God is not like a human creditor who demands payment from a debtor. God is the creditor who becomes the debtor, who pays the debt Himself, who absorbs the cost in His own being. The cross is not God demanding payment from an unwilling victim. It is God Himself stepping into the breach, bearing the consequences of human sin in the person of His eternal Son, and making forgiveness possible at infinite cost to Himself. That is what Anselm pointed toward — even if his framework did not always express it as clearly as it could have been expressed.

Hess also raises the question from Colossians 2:13–14, where Paul says God made us alive "having forgiven us all our trespasses, by canceling the record of debt that stood against us with its legal demands. This he set aside, nailing it to the cross" (ESV). Hess asks: Can God really claim to have "freely forgiven" if He still required payment?⁶¹ But notice what Paul says: the debt was canceled by nailing it to the cross. The cross is the means by which the debt is dealt with. God does not simply pretend the debt does not exist. He deals with it — at the cross. And the cross, as Paul makes clear throughout his letters, involves Christ bearing the consequences of our sin on our behalf. The "canceling" of the debt is not a cost-free amnesty. It is a costly act of divine love in which God Himself bears the weight of what our sin deserved.

So I am not persuaded by Hess's objection, even though I think he raises the right questions. Anselm's core insight — that God's nature requires that sin be dealt with, not merely overlooked — stands firm. Where Anselm can be improved is not by abandoning the objectivity of the atonement but by grounding it more explicitly in Trinitarian love. And that is exactly what the best formulations of substitutionary atonement have always done.

Peter Abelard (1079–1142) and the Moral Influence Theory

If Anselm is the father of the objective tradition in medieval atonement theology, Peter Abelard is the father of the subjective tradition. Their debate — or, more precisely, the tension between their two approaches — has echoed through every subsequent century of Christian thought, right down to the present day.

Abelard was one of the most brilliant and controversial figures of the medieval period. Born in Brittany in 1079, he became a dazzling lecturer and debater whose audiences in Paris were enormous. He is perhaps best known to the wider public for his passionate love affair with Heloise, which had tragic consequences for both of them. But in theological history, his lasting significance lies in his approach to the atonement.³²

A younger contemporary of Anselm, Abelard agreed with him on one point: the old ransom-to-the-devil theories needed to go. But he violently disagreed with Anselm's satisfaction theory. His objection was pointed and passionate: "How cruel and wicked it seems that anyone should demand the blood of an innocent person as the price for anything, or that it should in any way please him that an innocent man should be slain — still less that God should consider the death of his Son so agreeable that by it he should be reconciled to the whole world!"³³

If the cross is not a satisfaction for sin, what is it? Abelard's answer: it is primarily a demonstration of God's love that moves sinners to repentance, gratitude, and transformation. Christ's voluntary self-sacrifice on the cross reveals the depth and intensity of God's love for humanity. When we contemplate this love, our hearts are moved. We are stirred to respond with love of our own. And it is this responsive love — this change within us — that constitutes the atonement's real power. As Abelard wrote:

Redemption is that greatest love kindled in us by Christ's passion, a love which not only delivers us from the bondage of sin, but also acquires for us the true freedom of children, where love instead of fear becomes the ruling affection.³⁴

In support of his position, Abelard cited Jesus' words in Luke 7:47: "her sins are forgiven because she loved much." He interpreted this to mean that our love for God — awakened by contemplating the cross — is the basis on which God forgives us. Forgiveness comes through Christ's death, but indirectly: the cross evokes our love, and our love enables God to forgive.³⁵

Evaluating Abelard: What He Got Right

I want to be fair to Abelard, because he captured something genuinely important. The cross is a demonstration of God's love. Romans 5:8 declares that "God shows his love for us in that while we were still sinners, Christ died for us" (ESV). First John 4:10 says, "In this is love, not that we have loved God but that he loved us and sent his Son to be the propitiation for our sins" (ESV). The cross does transform those who contemplate it. Paul writes in 2 Corinthians 5:14, "The love of Christ controls us" (ESV). And the cross is an example for believers. First Peter 2:21 says that "Christ also suffered for you, leaving you an example, that you should follow in his steps" (ESV).

These are genuine and important truths. Any complete account of the atonement must include the cross's power to reveal God's love, to move the human heart, and to provide a model for self-sacrificing discipleship. Abelard saw this, and to that extent he was right.

Evaluating Abelard: What He Got Wrong

But the moral influence theory, taken as a complete account of the atonement — or even as the primary account — suffers from fatal weaknesses. Let me identify the most important ones.

First, Abelard's theory lacks an adequate account of why the cross was necessary. If God's primary goal was to demonstrate His love, could He not have done so in a less violent way? Why was the death of the Son of God on a Roman cross required? As Stott sharply observes, "If you were to jump off the end of a pier and drown, or dash into a burning building and be burned to death, and if your self-sacrifice had no saving purpose, you would convince me of your folly, not your love."³⁶ Love is purposive in its self-giving. If the cross accomplished nothing objective — if it merely inspired a subjective response in the viewer — then its terrible cost is inexplicable.

Second, the cross cannot demonstrate love unless it accomplished something objective. This is the moral influence theory's fatal flaw, and Stott states it with devastating clarity: "The cross can be seen as a proof of God's love only when it is at the same time seen as a proof of his justice."³⁷ The reason the cross displays love is precisely because it dealt with the real problem of human sin before a holy God. God's love is shown not in a random act of suffering but in His willingness to bear the cost of our redemption Himself. Remove the objective dimension — remove the satisfaction of divine justice — and the display of love is emptied of content. As R. W. Dale argued, "unless the great Sacrifice is conceived under objective forms, the subjective power will be lost."³⁸

Third, the moral influence theory makes forgiveness depend on our response rather than on Christ's accomplishment. In Abelard's framework, it is our love, our repentance, our transformation that ultimately grounds God's forgiveness. But this is exactly backward from the biblical picture. In the New Testament, forgiveness is grounded in what Christ has done, and our response of faith and love is the result of what He accomplished, not the condition of it. We do not earn forgiveness by being sufficiently moved by the cross. We receive forgiveness as a gift, on the basis of Christ's atoning work, and then we respond with gratitude and love. Abelard has confused the fruit of the atonement with its root.

Fourth, Abelard's theory does not take sin seriously enough. This was Stott's pointed verdict: "We need to quote against Abelard and Rashdall the words of Anselm, 'you have not yet considered the seriousness of sin.' The moral influence theory offers a superficial remedy because it has made a superficial diagnosis."³⁹ If sin is merely a bad habit that can be corrected by inspiration and example, then perhaps the moral influence theory is sufficient. But if sin is what the Bible says it is — a radical rebellion against God that brings death, judgment, and separation — then we need something far more powerful than a moving example. We need a substitute who bears the consequences of sin on our behalf.

A Fairer Reading of Abelard

Having identified the real weaknesses of the moral influence theory, I should note that recent scholarship has painted a more nuanced picture of Abelard himself. Allen reports that "recent scholarship shows that Abelard was not an exemplarist in that he did not explain the atonement exclusively as one that provides an example."⁴⁰ Abelard also expressed penal substitutionary ideas in his comments on Romans 4:25. The great medieval historian Caroline Walker Bynum has argued that "there are subjective and objective elements in the theories of both Anselm and Abelard.... Hence, it is quite wrong to see two redemptive theories warring for precedence in the twelfth century.... There are not two theories (Abelardian and Anselmian) in the Middle Ages but one."⁴¹

This is an important corrective. The real Abelard may have been more complex — and more orthodox — than the "Abelard" who appears in textbook summaries. Even so, his lasting legacy in the history of atonement theology has been the moral influence approach, and it is this approach that we must evaluate on its own terms. And on its own terms, it is insufficient. As Stott wisely concludes: "We should not, therefore, allow Anselm and Abelard to occupy opposite poles.... Anselm was right to understand the cross as a satisfaction for sin, but he should have laid more emphasis on God's love. Abelard was right to see the cross as a manifestation of love, but wrong to deny what Anselm affirmed. Anselm and Abelard need each other's positive witness, the one to God's justice and the other to his love."⁴²

I believe Stott is exactly right here. The truth lies not in choosing between Anselm and Abelard but in holding both insights together — and then going further than either of them to the full biblical picture of substitutionary atonement grounded in Trinitarian love.

The Influence of Abelard's Approach in Later Theology

Although Abelard's approach did not dominate medieval theology — Aulén notes that "it cannot be said that Abelard's thought exercised any great influence in the Middle Ages"⁴³ — it would prove enormously influential in later centuries. During the Enlightenment, thinkers who rejected the idea of blood sacrifice and divine wrath found in Abelard a congenial ancestor. Schleiermacher, Ritschl, and Harnack in the 19th century all developed versions of the subjective approach. In the 20th century, Hastings Rashdall championed the moral influence theory explicitly, arguing that "the truly penitent man who confesses his sins to God receives instant forgiveness" — making repentance, rather than Christ's atoning work, the ground of salvation.⁴⁴ More recently, critical voices like those of Steve Chalke and the authors of Recovering the Scandal of the Cross have drawn, consciously or not, on Abelardian instincts in their critiques of penal substitution (see Chapter 35 for detailed engagement). The moral influence impulse is very much alive.

Thomas Aquinas (1225–1274): The Great Medieval Synthesis

No treatment of medieval atonement theology would be complete without Thomas Aquinas, the greatest theologian of the Middle Ages and one of the most influential Christian thinkers of all time. Where Anselm was a pioneering genius who staked out bold new territory, and Abelard was a brilliant critic who challenged the reigning paradigm, Aquinas was the consummate synthesizer — a thinker of extraordinary breadth and depth who could hold together multiple strands of the tradition and weave them into a comprehensive whole.

Aquinas did not develop a single "theory" of the atonement in the way that Anselm did. Instead, he produced a remarkable synthesis, drawing together multiple biblical and theological themes into a unified account. In his Summa Theologiae (Part III), Aquinas spoke of Christ's death as accomplishing several things simultaneously: it was a satisfaction for sin, a merit that earned our salvation, a sacrifice offered to God, a redemption (payment of a price), and the efficient cause of our salvation. Unlike Anselm, who focused almost exclusively on satisfaction, Aquinas held these various dimensions together in creative tension. He drew on Anselm but also incorporated Augustinian and patristic themes — including the Christus Victor motif of deliverance from the devil's power, which Anselm had largely set aside.⁴⁵

What makes Aquinas especially important for our purposes is that he affirmed a penal satisfaction component in the atonement — going beyond Anselm's "either satisfaction or punishment" framework to include both. As Allen notes, Aquinas "likewise affirmed a penal satisfaction component in the atonement."⁴⁶ Aquinas agreed with Anselm that satisfaction was necessary, but unlike Anselm, he viewed the satisfaction as involving a genuinely penal element — Christ bore the punishment due to us.

How did Aquinas arrive at this position? He reasoned from several directions at once. From Anselm, he took the conviction that God's justice demands satisfaction for sin. From the biblical witness — especially the Servant Song of Isaiah 53 and the Pauline letters — he recognized that Christ's sufferings involved bearing the consequences of human sin. From the Augustinian tradition, he took a deep understanding of original sin and its effects on humanity. And from his own rigorous philosophical method, he developed a sophisticated account of how one person's actions can benefit others — what later theologians would call the principle of vicarious merit and satisfaction.

Aquinas's understanding of Christ as both priest and victim is particularly noteworthy. Christ is the one who offers the sacrifice and the sacrifice that is offered. This dual role preserves the voluntariness of Christ's self-offering (He is not a passive victim but an active priest) while affirming the costliness of what He endured (He is the victim whose sufferings satisfy divine justice). This priestly-sacrificial framework draws directly on the Epistle to the Hebrews, which Aquinas engaged extensively.

It is also worth noting that Aquinas's approach was more christological than Anselm's. Where Anselm's argument centers on the abstract logic of sin, honor, and satisfaction — with Christ entering the picture only as the solution to a logical dilemma — Aquinas's theology is more deeply rooted in the person and work of Christ Himself. For Aquinas, the Incarnation is not merely the means by which a suitable person is produced to offer satisfaction; it is the expression of God's love for the world, the union of divine and human natures that makes possible a uniquely efficacious act of redemption. The person of Christ — who He is in His divine and human natures — is not incidental to the atonement but constitutive of it.

This is historically significant. It means that the idea of penal substitution did not spring fully formed from the minds of Luther and Calvin. It had deep roots in the medieval period, mediated especially through Aquinas and the Thomistic tradition. The Catholic Thomistic tradition, as represented by thinkers like Philippe de la Trinité (whose work we draw on extensively in this book), continued to develop this emphasis on what they called "vicarious satisfaction" — Christ acting in our place, bearing the consequences of sin, but always understood within a framework of love and mercy rather than divine rage.⁴⁷

Peter Lombard, whose Sentences became the standard theological textbook of the later medieval period, also agreed with Anselm on satisfaction but "unlike Anselm, viewed it as penal substitution."⁴⁸ This means that by the time the Reformers arrived on the scene, the groundwork for a penal substitutionary understanding had already been laid within the Catholic theological tradition itself. The Reformation's contribution was to make this penal dimension more explicit, more central, and more directly tied to the biblical language of justification by faith.

The Distinction Between Vicarious Satisfaction and Penal Substitution

It is worth pausing here to clarify an important distinction that is sometimes confused in popular discussions. The Catholic Thomistic tradition speaks of "vicarious satisfaction" — Christ acting vicariously (in our place) to satisfy the demands of divine justice. The Protestant Reformation speaks of "penal substitution" — Christ bearing the penalty of sin as our substitute. Are these the same thing?

As Philippe de la Trinité argues from a Catholic perspective, there is a genuine distinction. In vicarious satisfaction, Christ willingly repays a debt He does not owe, because we owe a debt we cannot pay. The emphasis falls on Christ's voluntary self-offering in love and obedience. In the Reformers' version of penal substitution, the emphasis falls more directly on Christ suffering the punishment — the divine wrath — that was due to us.⁴⁹ Philippe de la Trinité objects to formulations that make the Father "pour out His wrath" on the Son, arguing that this distorts the Trinitarian unity of the cross. Instead, he insists that Christ is a "victim of love" acting in union with the Father — not the target of the Father's rage.⁵⁰

I find myself in substantial agreement with this Catholic emphasis. As I have argued throughout this book (and as Chapter 20 will develop in detail), the cross must always be understood within a Trinitarian framework of unified divine love. The Father did not pour out His anger on the Son. The Godhead acted together in love. This is where the Catholic tradition of vicarious satisfaction offers an important corrective to those Protestant formulations of penal substitution that (whether intentionally or not) pit the Father against the Son. The heart of the atonement is substitution grounded in love — and on this point, the best of the Thomistic tradition and the best of the evangelical tradition are closer than is often recognized.

Hugo Grotius (1583–1645) and the Governmental Theory

Although Grotius lived during the post-Reformation period, his governmental theory of the atonement represents an important alternative that grew out of the medieval tradition, and it is appropriate to treat it here as the final major medieval-era development.

Hugo Grotius was a Dutch lawyer and statesman — one of the founders of international law — who brought a jurist's eye to the atonement question. He proposed what has been called the "rectoral" or "governmental" theory. In Grotius's view, Christ's death was not a satisfaction of retributive justice (as in both Anselm and the Reformers) but rather a demonstration of God's commitment to upholding the moral government of the universe.

Grotius saw God not primarily as the offended party, nor as a creditor, nor even as a judge, but as "the Supreme Moral Governor of the world."⁵¹ God's concern in the atonement, on this view, is primarily public rather than retributive. Christ's death is not the paying of a penalty in the strict sense but a "distinguished example" of God's serious displeasure with sin — an object lesson that upholds the authority of God's moral law and deters future transgression.⁵²

Stott describes Grotius's position as "something of a compromise between Anselm and Abelard."⁵³ Like Anselm, Grotius preserved the objectivity of the cross — something real happened at Calvary that relates to God's governance of the moral universe. But like Abelard, Grotius sometimes emphasized the subjective influence of the cross in leading sinners to repentance. His primary contribution was the focus on God as moral ruler: "The right of inflicting punishment does not belong to the injured party as injured" but rather "to the ruler as ruler."⁵⁴

I believe the governmental theory captures a genuine element of truth. God is the moral governor of the universe. The cross does vindicate His moral government. But the governmental theory, taken by itself, is insufficient for several reasons. First, it reduces the cross to a public demonstration rather than an actual dealing with sin — and the biblical language of propitiation, expiation, and penalty-bearing (as argued in Chapters 8–12) demands something more. Second, it makes the cross fundamentally about deterrence and governance rather than about reconciliation and love — and this fails to do justice to the deeply personal, relational character of the atonement as presented in Scripture. Third, it tends to separate God's role as governor from His character as Father, Judge, and Redeemer — roles that the Bible holds together.

Grotius's governmental theory, then, highlights a real dimension of the cross but cannot stand alone as a complete account. Like Anselm's satisfaction theory and Abelard's moral influence theory, it captures one facet of a multi-dimensional reality.

That said, the governmental theory has had a significant afterlife. Several 20th-century theologians took up Grotius's vision. P. T. Forsyth wrote of "this cosmic order of holiness" and argued that "God's moral order demands atonement wherever moral ideas are taken with final seriousness."⁶² B. B. Warfield drew attention to the universal sense of guilt among human beings — a "deep moral self-condemnation which is present as a primary factor in all truly religious experience" — and argued that this guilty conscience "cries out for expiation."⁶³ These thinkers preserved Grotius's insight about the moral order while grounding it more deeply in the personal, relational character of God's dealings with humanity. The best versions of the governmental theory are not alternatives to substitutionary atonement but complementary perspectives that highlight the cosmic and public dimensions of what Christ accomplished.

The Scotist Alternative: Duns Scotus and the Question of Acceptation

While Aquinas and his followers (the "Thomists") developed one major line of medieval atonement theology, another important alternative emerged from Duns Scotus (c. 1266–1308) and his followers (the "Scotists"). Stott notes that both groups — the Thomists among the Dominicans and the Scotists among the Franciscans — "further developed Anselm's position" and "both taught that the demands of divine justice were satisfied by Christ's cross," though they differed in important details.⁶⁴

Scotus introduced the concept of "acceptation" (acceptatio divina) — the idea that the value of Christ's work depends not on any inherent property of the act itself but on God's sovereign decision to accept it as sufficient. In other words, Christ's death has atoning value because God freely chose to accept it as satisfactory, not because it possesses some inherent infinite worth that automatically satisfies divine justice. This may seem like a subtle distinction, but it has significant implications. It places the emphasis squarely on God's sovereign will and grace rather than on any "mechanism" by which the atonement operates.

The Scotist approach has been criticized for making the atonement seem somewhat arbitrary — as though God could have chosen to accept anything as satisfactory and simply happened to choose the death of Christ. But it also has a genuine strength: it preserves the freedom and sovereignty of God in a way that some versions of the satisfaction theory do not. God is not constrained by some external standard of justice to which He must conform. Rather, God freely and graciously chooses to deal with sin through the cross — a choice that flows from His own loving nature, not from external compulsion.

The debate between Thomists and Scotists on this point would continue for centuries, and echoes of it can be heard in modern discussions about whether the atonement was "necessary" or "fitting" — whether God had to save humanity through the cross or chose to do so. I believe the biblical answer is that the cross was necessary in the sense that it flows from God's character (His holiness, justice, and love together demanded a costly reckoning with sin) while being simultaneously free and voluntary (God was not compelled by any external force but acted from His own gracious nature). This holds together the insights of both Thomists and Scotists while avoiding the extremes of either.

Medieval Devotion to the Passion: The Experiential Dimension

Before closing this chapter, I want to spend some time on a dimension of medieval atonement theology that is often overlooked in scholarly treatments but was enormously important in the actual religious life of the period: the devotion to the Passion of Christ. While Anselm and Abelard debated in the lecture halls, and Aquinas and Scotus refined their arguments in the universities, ordinary Christians were encountering the cross in a different way entirely — through meditation, prayer, art, and liturgy.

Aulén perceptively notes that alongside the scholastic theories of Anselm and Abelard, there flourished a rich tradition of meditation on Christ's sufferings — what he calls "Passion-mysticism."⁵⁵ This was not so much a formal theology as a spiritual practice: the devout soul would enter contemplatively into the sufferings of Christ, feeling His pain, marveling at His love, and being drawn deeper into union with Him. Thomas à Kempis captured this spirit in his famous Imitation of Christ: "The whole life of Christ was a cross and a martyrdom."⁵⁶ The attitude of the devout believer was to be meditatio et imitatio — meditation on Christ's sufferings and imitation of His example, so as to be "cleansed and united with the eternal Divine Love."

This Passion-devotion served as both a complement and a counterweight to the rationalistic scholastic theories. Where Anselm's argument was logical and juridical, the Passion-mystics were emotional and personal. Where the scholastics debated the mechanics of satisfaction and merit, the mystics wept at the foot of the cross and found their hearts transformed. As Aulén observes, "It is, indeed, not surprising that an emotional mysticism of this type should appear side by side with the thoroughly rationalistic and juridical theory of the satisfaction of God's justice."⁶⁵ Just as Pietism would later emerge as a counterweight to the dry scholasticism of Protestant orthodoxy, so medieval Passion-devotion filled a spiritual hunger that the formal theories could not satisfy.

The influence of this devotional tradition can be seen vividly in medieval art. The earlier "triumph-crucifixes" — which depicted Christ on the cross as the regal Victor, eyes open, crowned, reigning even from Golgotha — gradually gave way to crucifixes that emphasized the human suffering of Jesus: the agony, the blood, the broken body. As Aulén notes, "The triumph-crucifix of an earlier period is now ousted by the crucifix which depicts the human Sufferer."⁵⁷ This shift in artistic representation reflected a deeper shift in theological sensibility. The note of triumph that had characterized early Christian proclamation — the joyful announcement that Christ has conquered death and the devil — was being displaced by a contemplation of Christ's sufferings that, while deeply moving, risked losing the Easter dimension of the gospel.

And yet the Christus Victor tradition was never entirely lost, even in the Middle Ages. Aulén rightly points out that Easter hymns and liturgical texts continued to proclaim the "conflict of Life with Death and the triumph of the Prince of Life."⁶⁶ The well-known Easter sequence Victimae paschali sets forth exactly this dramatic theme of Christ's cosmic victory. Sacred poetry, mystery plays, and the Easter liturgy all kept alive the triumphant note. Even during the period when scholastic theology was dominated by satisfaction and merit categories, the worshipping church continued to sing of Christ the Victor. This is a reminder that the church's living faith has always been richer and more multi-dimensional than any single theological theory can capture.

The best medieval Passion-devotion, however, held together what the formal theories often separated: the objective accomplishment of the cross (Christ dealing with sin before God) and its subjective power (the cross moving the human heart to love and repentance). In this, the mystics were arguably closer to the full biblical picture than either Anselm or Abelard taken alone. The challenge for later theology would be to articulate this holistic vision in a form that was both intellectually rigorous and spiritually alive — to produce an account of the atonement that could satisfy the mind of Anselm and the heart of the medieval mystic at the same time.

Conclusion: The Medieval Legacy and the Road Ahead

The medieval period bequeathed to the church a rich and complex legacy on the atonement. Anselm gave us the permanent insight that the cross must deal with something real and objective in God's nature — that sin is infinitely serious, that forgiveness cannot be cheap, and that only the God-man can bridge the gap between a holy God and sinful humanity. Abelard reminded us that the cross is a demonstration of divine love that transforms those who contemplate it. Aquinas showed that multiple dimensions of the atonement can and should be held together. And Grotius highlighted the cross's role in vindicating God's moral governance of the universe.

But none of these medieval proposals, taken individually, captures the full biblical picture. Anselm's satisfaction theory lacks the explicitly penal and substitutionary dimension that the biblical texts demand. Abelard's moral influence theory lacks the objective grounding that prevents the cross from being reduced to a subjective experience. Aquinas came closest to a comprehensive synthesis but did not fully integrate his multiple themes into a unified theory. And Grotius's governmental theory, while highlighting a genuine dimension, subordinates the deeply personal character of the atonement to questions of public moral order.

What stands out most clearly when we survey the medieval landscape is that the church was grappling — honestly and seriously — with the deepest questions about the meaning of the cross. Why did God become man? What did Christ's death accomplish? How does it relate to God's justice and love? How does it change us? These are not idle academic questions. They are the questions that determine how we understand the heart of the gospel. And the medieval theologians, for all their limitations, advanced our understanding of these questions in ways that remain permanently important.

One pattern emerges repeatedly in this period: whenever theologians tried to reduce the atonement to a single dimension, something essential was lost. Anselm, focusing on objective satisfaction, lost the subjective transformative power of the cross. Abelard, focusing on subjective transformation, lost the objective accomplishment. Aquinas, to his credit, tried to hold everything together — but the medieval framework did not yet have the tools to produce a fully integrated synthesis. The Devotion to the Passion kept alive the personal, affective encounter with the cross that the scholastic theories sometimes neglected, but it lacked the theological rigor that could explain why the cross moves us so deeply.

What was needed — and what later theology would increasingly supply — was a framework that could hold all of these genuine insights together while correcting their individual weaknesses. Such a framework would need to place substitution at the center (as Anselm rightly intuited), affirm the penal dimension (as Aquinas and Peter Lombard were beginning to do), ground everything in Trinitarian love (correcting the tendency to pit Father against Son), recognize the transformative power of the cross (as Abelard emphasized), and acknowledge the cosmic scope of Christ's victory over evil (as the Christus Victor tradition maintained).

As we will see in Chapter 17, the Reformation took significant steps in this direction. Luther and Calvin, building on the foundation that Anselm and the medieval tradition had laid, would develop the most explicit and systematic articulation of substitutionary atonement that the church had yet seen — an articulation that, for all its own limitations, remains the most faithful account of the biblical testimony about what Christ accomplished on the cross. Luther in particular would recover the triumphant Christus Victor note that Anselm had dampened, combining it with a robust substitutionary theology in a way that had not been achieved since the early church.

But we should not leave the medieval period with a sense that it was merely a preliminary stage, a stepping-stone to something better. Anselm's Cur Deus Homo remains one of the most important works ever written on the atonement. His central question — Why did God become man? — is the right question. His answer — because God's nature required a costly dealing with sin that only the God-man could provide — is profoundly correct in its essential thrust. The medieval theologians were not wrong. They were incomplete. And the story of how their genuine insights were preserved, corrected, and developed is one of the most important chapters in the history of Christian thought. We stand on their shoulders, and we should be grateful.