Chapter 16
Anselm, Abelard, and Medieval Atonement Theology

Introduction: A Turning Point in the Story of the Cross

Every great story has turning points — moments where everything shifts. In the long story of how Christians have understood the death of Jesus, the medieval period produced one of the most important turning points of all. Two brilliant thinkers, Anselm of Canterbury and Peter Abelard, offered two very different explanations of why Jesus died. Their ideas shaped every conversation about the cross that followed — all the way down to the debates that continue in our own day.

In the previous chapters, we traced how the earliest Christians and the Church Fathers thought about the atonement. As we saw in Chapters 13–15, the dominant way of thinking about the cross during the first thousand years of the church was what scholars call the "classic" or Christus Victor model — the idea that Christ's death and resurrection were a dramatic victory over the powers of sin, death, and the devil. We also saw that substitutionary themes were genuinely present in many of the Fathers, even if they had not yet been organized into a fully developed theological system. The patristic writers often held together multiple ideas about the cross — victory, sacrifice, ransom, substitution — without feeling the need to choose just one.

But as the medieval period dawned, the landscape began to change. The theologians of the Middle Ages were less content to leave these ideas loosely connected. They wanted to ask: Why exactly did God become human? Why precisely was the cross necessary? What specific problem did Christ's death solve? These are the questions that Anselm tackled in his great work Cur Deus Homo? ("Why Did God Become Man?"), and his answers would reshape the entire Western tradition of atonement theology.

The thesis of this chapter is straightforward: 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. We will also examine the important contributions of Thomas Aquinas, who synthesized multiple atonement themes into a richer whole, and Hugo Grotius, whose governmental theory added yet another voice to this ongoing conversation. Along the way, I will argue that Anselm's core insight — that the atonement must satisfy something in God's own nature — was profoundly correct, even though his particular formulation in terms of feudal honor needed the refinement that later theologians would provide.

The World Anselm Entered: Setting the Stage

To understand what Anselm accomplished, we need to understand what he was reacting against. As we saw in Chapter 14, by the end of the patristic era the dominant way of explaining Christ's saving work focused on the dramatic victory of Christ over the devil. Many of the early Fathers — Origen, Gregory of Nyssa, and others — had described the atonement using vivid imagery of ransom, conflict, and even divine deception. The devil, they taught, had gained certain "rights" over fallen humanity because of sin. Christ's death was the ransom price paid to the devil to set his captives free.

Some Fathers went further and described Christ's death as a kind of divine trick. Gregory of Nyssa, for example, used the image of a fishhook: God concealed his deity beneath the "bait" of Christ's humanity, and the devil, like a greedy fish, swallowed the bait only to be caught by the hidden hook of divinity.¹ Augustine used the image of a mousetrap baited with Christ's blood.² These images strike us as strange and even grotesque today, but the underlying conviction was powerful: Christ had invaded enemy territory and won a decisive victory.

The problem was that many of these formulations seemed to give the devil too much credit. Did the devil really have legitimate "rights" over humanity that God was obligated to respect? Was the Creator of the universe really in a bargaining relationship with a fallen angel? Gregory of Nazianzus, as we noted in Chapter 14, was one of the few early voices to vigorously reject this idea, calling it an "outrage" to suggest that the devil had any legitimate claim that God needed to honor.³

It was into this context that Anselm stepped. He wanted to leave behind what he considered the mythological and sometimes fantastical imagery of the ransom-to-the-devil theories and put the doctrine of the atonement on firmer, more rational ground. His answer would prove to be one of the most important theological works ever written — even if it was also one of the most debated.

Anselm of Canterbury and Cur Deus Homo?

The Man Behind the Book

Anselm (1033–1109) was an Italian-born monk who eventually became archbishop of Canterbury in England. John Stott describes him as "a godly Italian, who first settled in Normandy and then in 1093, following the Norman Conquest, was appointed archbishop of Canterbury."⁴ He has often been called the "Father of Scholasticism" — that is, the first great representative of the medieval movement that tried to bring together faith and reason, biblical revelation and philosophical logic. His famous motto was fides quaerens intellectum — "faith seeking understanding." Anselm was not trying to prove the faith from scratch; he was a believing man who wanted to understand why what he believed made sense.

This is an important point to grasp, because critics sometimes accuse Anselm of replacing biblical revelation with philosophical speculation. But that misreads his project. Anselm took the basic Christian confession — that the Son of God became man and died for our salvation — as his starting point. His question was not whether this was true, but why it made sense, why it was necessary, and how it could be explained in a way that would satisfy both faith and reason. He wrote Cur Deus Homo? partly as a response to unbelievers who mocked the incarnation as absurd and partly to help believers understand the inner logic of the gospel. His overriding concern, as Stott notes, was to be "agreeable to reason" (Cur Deus Homo? 2.11).

Fleming Rutledge makes an important point about how we should read Anselm. Too many people, she argues, read him "solely as a dry scholastic thinker" and miss the warmth and pastoral concern that runs through his work. She insists that we should "read Anselm first as an artist, even as a storyteller, and only then as a thinker."⁵ His interlocutor Boso — the dialogue partner who asks questions throughout Cur Deus Homo? — speaks for all believers when he says: "I come not for this purpose, to have you remove doubts from my faith, but to have you show me the reasons for my confidence."⁶ Boso already believes. He wants to understand why his faith makes sense. That is exactly what Anselm set out to show.

Anselm's Argument Step by Step

Anselm's argument in Cur Deus Homo? can be laid out in a series of clear logical steps. Let me walk through them carefully, because understanding this argument is essential for everything that follows in the history of atonement theology.

Step 1: Sin is an offense against God's honor. Anselm begins by defining sin as "not rendering to God what is his due" (Cur Deus Homo? 1.11).⁷ Every creature owes God complete obedience and submission. When we sin, we withhold what belongs to God. We steal from him, so to speak, and in doing so we dishonor him. As Stott summarizes: "To sin is, therefore, to 'take away from God what is his own,' which means to steal from him and so to dishonor him."⁸

Step 2: God's honor cannot be left unsatisfied. Anselm argues that God cannot simply overlook sin. "It is not proper for God to pass by sin thus unpunished" (Cur Deus Homo? 1.12).⁹ If anyone thinks God can just wave away the offense, Anselm has a famous rebuke: nondum considerasti quanti ponderis sit peccatum — "you have not yet fully weighed the gravity of sin."¹⁰ This is not, for Anselm, about God being petty or thin-skinned. It is about God's nature. A God who simply ignores evil is not truly just, and a God who is not truly just is not truly God. As Rutledge observes, Anselm's point — however much its feudal language may feel foreign to us — is that "a society of impunity is intolerable."¹¹

Step 3: The offense against an infinite God requires an infinite satisfaction. Here is where Anselm's logic becomes especially powerful. Because God is infinite in his glory, dignity, and worth, a sin against God is not just a small offense. It is an offense of infinite weight. As David Allen explains, "Sin is an infinite offense against God and thus requires an equally infinite satisfaction."¹² No finite creature can provide what is needed.

Step 4: Humanity ought to make this satisfaction, but cannot. Anselm insists that the debt is owed by human beings. We are the ones who sinned, so we are the ones who should make it right. But we cannot. Our present obedience and good works are already owed to God anyway — they cannot serve as extra payment for past sin. As Stott puts it, Anselm's first book ends with the dilemma: "Man the sinner owes to God, on account of sin, what he cannot repay, and unless he repays it he cannot be saved" (Cur Deus Homo? 1.25).¹³

Step 5: Only God can provide the required satisfaction, but only a human being owes it. This is the crux of the entire argument. God alone has the power to offer an infinite satisfaction. But only a human being has the obligation to offer it, since only humans are the sinners. The result is Anselm's famous conclusion: "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" (Cur Deus Homo? 2.6).¹⁴

Step 6: The God-man Jesus Christ provides the satisfaction. Jesus, who is fully God and fully human, was sinless and therefore was not obligated to die. His voluntary self-offering in death was the greatest gift that could be given to God — a gift of infinite value because of the infinite dignity of the one who gave it. As Anselm puts it, "Nothing is more difficult or harder for a man to do for God's honour than to suffer death voluntarily; and no man can give himself to God more than when he commits himself to death for God's honour" (Cur Deus Homo? 2.11).¹⁵ Because Christ's life was "so good, so exalted and so precious," his sacrifice in death "outweighs the number and greatness of all sins" (Cur Deus Homo? 2.14).¹⁶

Evaluating Anselm: Strengths

I believe Anselm made several contributions that remain permanently valuable for atonement theology.

First, Anselm grounded the necessity of the atonement in God's own nature. Earlier theories, especially the ransom-to-the-devil models, located the necessity of the cross in the devil's power or supposed rights. Anselm decisively shifted the focus. The reason Jesus had to die was not because of the devil, but because of who God is. As Allen observes, Anselm "broke with the concept of Christ paying a debt to Satan and maintained that the debt was paid to God."¹⁷ This was a massive step forward. The cross is ultimately about the relationship between God and humanity — not about a transaction with the enemy.

Second, Anselm took the gravity of sin with utter seriousness. His insistence that we have "not yet considered the weight of sin" is a rebuke that every generation of Christians needs to hear. Sin is not a small matter. It is an offense against the infinite God, and it cannot simply be dismissed or ignored. If there is one thing Anselm got deeply right, it is this: any theory of the atonement that makes sin trivial or makes forgiveness cheap has missed something essential.

Third, Anselm emphasized the objective dimension of the atonement. Something real happened at the cross. Christ's death was not merely a moving display or a good example (as Abelard would soon argue). It actually accomplished something — it provided what was needed to restore the broken relationship between God and humanity. The cross is not just about how we feel; it is about what God has done.

Fourth, Anselm recognized the unique qualifications of Christ as the God-man. His careful argument that only someone who was both fully divine and fully human could solve the human predicament is theologically brilliant. It connects the doctrines of the incarnation and the atonement in a way that preserves both the deity and the humanity of Christ — a connection that echoes, as Rutledge notes, the concerns of the early ecumenical councils.¹⁸

Robert Franks called Cur Deus Homo? "epoch-making in the whole history of our doctrine," and James Denney went even further, calling it "the truest and greatest book on the atonement that has ever been written."¹⁹ Ben Pugh is probably right that the book "should be viewed as more post-patristic than proto-Reformed."²⁰ That is, Anselm was building on what the Fathers had already begun to say rather than simply inventing something entirely new.

Evaluating Anselm: Weaknesses and Limitations

For all his brilliance, however, Anselm's model has significant limitations that we need to be honest about.

First, Anselm's framework is deeply shaped by the feudal culture of his age. His language of "honor," "satisfaction," and "merit" comes from the world of medieval feudalism, where society was organized around lords and vassals, and where the honor of a superior had to be upheld at all costs. When God is pictured as a feudal overlord whose wounded honor must be repaired, Stott rightly notes that "it is questionable whether this picture adequately expresses the 'honor' which is indeed due to God alone."²¹ The concept of God's "honor" is real — God truly deserves our worship and obedience — but it risks making God sound like a medieval nobleman who is touchy about his social standing.

Second, and more significantly, Anselm's model does not include a genuinely penal dimension. Notice that Anselm speaks of satisfaction, not punishment. In his scheme, Christ does not bear a penalty for sin; instead, he offers a positive compensation — a gift of honor — that makes up for what humanity stole from God. As Gustaf Aulén observes, in Anselm's system "the whole emphasis is on the death as an isolated fact, and as in itself constituting the satisfaction." The note of triumph that characterized the patristic view "is damped down" because "the dualistic outlook has gone."²² Later theologians would recognize that the atonement involves not only offering something positive to God but also bearing the judicial consequences of sin — a dimension that Anselm did not fully develop.

Third, Aulén raises the important criticism that Anselm's model creates what he calls "a discontinuity in Divine operation." In the patristic view, the atonement was from start to finish the work of God — God coming down to rescue humanity. But in Anselm's model, there is a crucial shift: the satisfaction is offered to God by Christ as man, from the human side. As Aulén puts it, "Anselm does not give up his basic assumption that the required satisfaction must be made by man; on the contrary, he holds firmly to it, and the whole object of his argument is to show how the Man appears who is able to give the satisfaction which God absolutely demands."²³ This means that the organic connection between the incarnation and the atonement — which the Fathers had emphasized so powerfully — is weakened. In the patristic view, God became human in order to accomplish redemption directly. In Anselm's view, God became human so that a qualified human being could offer the necessary satisfaction.

Fourth, Anselm's framework is almost entirely juridical. His continual refrain is nihil rationabilius — "nothing could be more reasonable." Everything must be worked out according to strict rational necessity. But as Aulén perceptively notes, "the classic idea of the Atonement defies rational systematisation; its essential double-sidedness, according to which God is at once the Reconciler and the Reconciled, constitutes an antinomy which cannot be resolved by a rational statement."²⁴ There is a mystery at the heart of the cross that cannot be fully captured by any legal framework, no matter how carefully constructed.

Fifth, Anselm's use of the concept of "merit" — the idea that Christ's death earned an excess of merit that could be transferred to humanity — introduces a category that has no clear biblical basis. While the New Testament does speak of Christ's death as "for us" and "on our behalf," it does not use the language of accumulated merit being transferred from one party's account to another's. As Allen notes, "the NT does not speak of merit in connection with the atonement."²⁵

Anselm and the Patristic Tradition: Continuity and Discontinuity

How does Anselm relate to the Church Fathers we examined in Chapters 13–15? The answer, I think, involves both continuity and discontinuity.

The continuity is real. Aulén himself acknowledges that the Latin theory of the atonement did not appear out of thin air with Anselm. It had roots stretching back to Tertullian, who first used the legal terms merit and satisfaction in the context of penance, and to Cyprian, who applied these ideas to the atonement of Christ.²⁶ Gregory the Great, writing centuries before Anselm, had already sketched out a very similar argument: human guilt required a sacrifice, but only a sinless man could offer it, and since no human being was sinless, the Son of God had to become man to make the sacrifice on humanity's behalf.²⁷ Anselm was, in a real sense, building on materials that others had already quarried.

The discontinuity, however, is equally real. In the patristic view, as we saw in Chapters 13–15, the atonement was depicted as a continuous divine action — God descending to conquer the powers of evil and rescue humanity. In Anselm, the action is "discontinuous," to use Aulén's term. God initiates the plan, but the actual execution of the satisfaction is an offering made by Christ as man to God. Aulén captures this contrast vividly: "If the patristic idea of Incarnation and Redemption may be represented by a continuous line, leading obliquely downwards, the doctrine of Anselm will require a broken line; or, the line that leads downwards may be shown as crossed by a line leading from below upwards."²⁸

What are we to make of this? I believe the truth is that both dimensions are present in Scripture. There is a "downward" movement — God coming to save — and there is a human offering — Christ, as truly human, giving himself as a sacrifice. The Fathers emphasized the first; Anselm emphasized the second. A complete account of the atonement, as I will argue in Chapter 24, needs both. Substitutionary atonement at its best holds these two movements together: it is God himself who, in the person of his incarnate Son, stands in our place and bears what we could not bear. This is what Stott would later call "the self-substitution of God" — a concept we will explore fully in Chapter 20.

The Relationship Between Anselm and Penal Substitution

This is a crucial question: What is the relationship between Anselm's satisfaction theory and the later doctrine of penal substitutionary atonement (PSA) that the Reformers would develop?

There are important similarities. Both Anselm and PSA agree that the atonement must satisfy something in God's own nature. Both agree that human beings cannot save themselves and that only the God-man can provide what is needed. Both see the cross as an objective accomplishment — something that actually changes the situation between God and humanity, not merely a subjective display.

But there are also crucial differences. Anselm spoke of satisfying God's honor; PSA speaks of satisfying God's justice. Anselm described Christ's death as offering a positive compensation to God — a gift that outweighs the offense of sin; PSA describes Christ's death as bearing the penalty that sinners deserved. In Anselm, there is no punishment; there is only the provision of a compensating good. In PSA, Christ actually bears the judicial consequences of sin on our behalf.²⁹

As Allen helpfully puts it, the Reformers "recast" the Anselmian portrayal "in forensic terms. The atonement would come to be viewed as both satisfaction and penal substitution."³⁰ Calvin and other Reformed theologians "went beyond Anselm and the satisfaction theory into actual punishment categories, thus strengthening the penal substitutionary nature of the atonement."³¹ This development was, I believe, an important and necessary refinement. The biblical data — especially the Servant Song of Isaiah 53 (examined in depth in Chapter 6) and the Pauline testimony of passages like 2 Corinthians 5:21 and Galatians 3:13 (examined in Chapter 9) — speaks not only of an offering made to God but of penalty-bearing, of curse-bearing, of being "made sin" for us. Anselm's framework, for all its strengths, could not fully accommodate this biblical language. PSA could.

At the same time — and this is a point I want to stress — the specific formulation of PSA matters enormously. As we will argue in Chapters 19 and 20, a rightly understood PSA must preserve the Trinitarian unity that some crude formulations have tragically lost. The Father does not pour out wrath on an unwilling victim. The Triune God acts in unified love. The Son goes willingly. The Father sends him in love. When we lose sight of this, we distort the doctrine into the "cosmic child abuse" caricature that Steve Chalke and others have rightly condemned. But the answer to a distorted PSA is not to abandon PSA; it is to get PSA right.

Peter Abelard and the Moral Influence Theory

Abelard's Challenge to Anselm

If Anselm focused on what the cross accomplished before God, his younger contemporary Peter Abelard (1079–1142) focused on what the cross accomplishes within us. Abelard is often called the father of the "moral influence" or "subjective" theory of the atonement — the idea that Christ's death is primarily a demonstration of God's love that moves sinners to repentance and transformation. While recent scholarship has complicated this portrait (as we will see), the basic contrast between Anselm and Abelard has been a fixture of atonement theology for nearly a thousand years.

Abelard attacked both the older patristic theories and Anselm's newer formulation. On the one hand, he rejected any notion that the atonement had something to do with the devil — there was no ransom paid to the devil, and the devil had no legitimate rights over humanity. On the other hand, he sought to show the impossibility of Anselm's satisfaction framework. As Aulén summarizes Abelard's criticism: "If Adam's lesser fault required such a satisfaction, how much greater ought to be the satisfaction demanded by sins against Christ!"³² In other words, if the satisfaction theory were true, the crucifixion itself — the murder of the Son of God — would create a debt even larger than the one it was supposed to pay off.

Having cleared the ground, Abelard offered his own explanation. Christ is above all the great Teacher and Example. His death on the cross is the supreme demonstration of God's love, and when sinners contemplate this love, they are moved to love God in return. This responsive love becomes the basis for reconciliation and forgiveness. Abelard's key text was Luke 7:47: "Much is forgiven to them that love much."³³ The cross, in this view, does not change anything in God's attitude toward us. Rather, it changes us — it melts our hard hearts, awakens our love, and draws us back to God.

Was Abelard Really Just a "Moral Influence" Theorist?

Here is where things get interesting. Recent scholarship has shown that the standard picture of Abelard as a pure moral influence theorist — someone who denied any objective dimension to the atonement — is actually an oversimplification. Allen observes 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" but also "expressed a penal substitution notion" in his comments on Romans 4:25.³⁴

This important finding has been confirmed by the medieval historian Caroline Walker Bynum, who argues that the standard contrast between Anselm and Abelard as two opposing camps has been seriously overdrawn. Allen quotes Bynum's remarkable conclusion: "Anselmian and Abelardian understandings of Christ's work of redemption were far closer to each other than generally portrayed. 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."³⁵

This is a surprising conclusion, but it actually confirms something I have been arguing throughout this book: the atonement is multi-faceted. Even the medieval thinkers who seemed to be pulling in different directions were often acknowledging more dimensions of the cross than their popular reputations suggest. Anselm was not only about satisfaction; Abelard was not only about moral influence. Both had objective and subjective elements.

Nevertheless, the emphases are different, and the emphasis matters. Abelard's primary contribution was to insist that the cross must transform the sinner's heart. The cross is not just a legal transaction that happens "out there" — it is a display of love that changes us "in here." And on this point, Abelard was absolutely right.

Evaluating Abelard: Strengths

Abelard's theory has genuine strengths that we should not overlook.

First, the cross is a demonstration of divine love. This is not Abelard's invention; it is straight from Scripture. "God shows his love for us in that while we were still sinners, Christ died for us" (Rom. 5:8, ESV). "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" (1 John 4:10, ESV). The cross does reveal the love of God in a way that is meant to move us, transform us, and awaken a response of love within us.

Second, the cross is an example for believers. "For to this you have been called, because Christ also suffered for you, leaving you an example, so that you might follow in his steps" (1 Pet. 2:21, ESV). Peter explicitly says that Christ's suffering provides a pattern for our lives. Abelard was right to emphasize this.

Third, Abelard was right to insist that atonement theology must connect to actual transformation. A theory of the atonement that changes God's attitude toward us but leaves us unchanged would be incomplete. Whatever else the cross accomplishes, it must also produce new life, new love, and new obedience in those who trust in Christ.

Evaluating Abelard: Weaknesses

Despite these strengths, Abelard's theory — at least as it is popularly understood — has fatal weaknesses that make it insufficient as a standalone account of the atonement.

First, and most importantly, if the cross is only a demonstration of love and an example to follow, why was it necessary at all? Could God not have demonstrated his love in some less violent way? If nothing objective needed to happen at the cross — if there was no debt to be paid, no justice to be satisfied, no penalty to be borne — then the crucifixion seems arbitrary and even cruel. As Stott powerfully argued in his treatment of the moral influence theory, without an objective accomplishment — a real satisfaction of justice, a genuine defeat of the powers of evil, an actual payment of the debt of sin — the demonstration of love is emptied of content.³⁶ A God who sends his Son to die simply to make a point, when the same point could have been made less painfully, is not a God of wisdom and love but a God of wasteful cruelty.

Second, Abelard's theory reduces the cross from an objective accomplishment to a subjective experience. Everything depends on our response. If we are moved by the cross, we are saved; if we are not moved, nothing has happened. But the New Testament consistently presents the cross as something that accomplished salvation before we ever responded to it. "While we were still sinners, Christ died for us" (Rom. 5:8). "While we were enemies we were reconciled to God by the death of his Son" (Rom. 5:10). The cross is effective not because of our response but because of what God has done.

Third, Abelard's approach cannot adequately account for the rich substitutionary, sacrificial, and judicial language of the New Testament. Isaiah 53 speaks of the Servant bearing our iniquities, being crushed for our transgressions, and the Lord laying on him the iniquity of us all (as we examined in Chapter 6). Paul speaks of Christ being "made sin" for us (2 Cor. 5:21) and "becoming a curse" for us (Gal. 3:13). The author of Hebrews describes Christ's death as a once-for-all sacrifice that purifies the conscience and opens access to God (Heb. 9–10, as examined in Chapter 10). This language cannot be flattened into "God showed us how much he loves us." Something more is happening — something objective, substitutionary, and sacrificial.

Fourth, the moral influence theory has difficulty explaining why Christ's death, specifically, is the supreme demonstration of love. If God simply wanted to show us how much he cares, there were presumably less painful ways to do it. The fact that the New Testament insists it had to be this death — a sacrificial death, a death "for sins," a death in which the righteous One suffers for the unrighteous — suggests that the cross is doing more than simply displaying love. It is accomplishing something. It is dealing with a real problem — the problem of sin and justice — that could not be solved any other way. The demonstration of love is real, but it is a demonstration precisely because something real is being accomplished. Remove the accomplishment, and the demonstration loses its power.

Aulén notes that Abelard's ideas had little influence in the Middle Ages. His contemporaries found his approach too radical. "In particular, the fact that he attached no special significance to the death of Christ was sufficient of itself to make his teaching unacceptable to an age which was laying ever greater stress on the death, both in theology and in devotional practice."³⁷ Nevertheless, Abelard's approach would experience a powerful revival centuries later during the Enlightenment and in liberal Protestantism, as we will trace in Chapter 18.

Thomas Aquinas: The Great Synthesizer

No discussion of medieval atonement theology would be complete without Thomas Aquinas (1225–1274), arguably the greatest theologian of the entire medieval period. Where Anselm and Abelard tended to emphasize one dimension of the atonement, Aquinas tried to hold multiple dimensions together.

In his massive Summa Theologiae (especially Part III), Aquinas described Christ's death as simultaneously a satisfaction, an act of merit, a sacrifice, a redemption, and the efficient cause of salvation. He drew on Anselm but also incorporated Augustinian and patristic themes, including elements of the Christus Victor motif.³⁸ Allen observes that "Aquinas spoke of the atonement as a satisfaction, an example, and a victory over Satan. However, he did not integrate these themes into a theory of the atonement."³⁹ That is, Aquinas recognized multiple facets of the cross without reducing them all to a single explanatory principle.

This is remarkably close to the approach I am advocating in this book — a multi-faceted understanding of the atonement. Aquinas recognized that no single category can exhaust the meaning of the cross. The death of Christ is too rich, too deep, and too multi-layered to be captured by any one theory.

Aquinas and Vicarious Satisfaction

Where Aquinas especially shines — and where he is particularly relevant to our argument — is in his development of what the Catholic tradition calls "vicarious satisfaction." This is the idea that Christ's death was a satisfaction for sin, but one rooted not in wrath or punishment but in love and mercy.

Philippe de la Trinité, the Catholic Thomistic theologian whose work is an important resource for this book, draws a sharp distinction between the Catholic doctrine of vicarious satisfaction (rooted in Anselm and Aquinas) and the later Protestant doctrine of penal substitution (rooted in Luther and Calvin). As he explains it, the difference is this: in vicarious satisfaction, "Jesus willingly repays a debt he doesn't owe (ours), precisely because we owe a debt that we cannot pay, out of love." In penal substitution, by contrast, "Jesus passively suffers divine wrath and retribution at the hands of his Father."⁴⁰

Now, I want to be careful here, because I think Philippe de la Trinité draws the contrast too sharply. As I have been arguing throughout this book, a rightly formulated penal substitution does not depict Jesus as "passively suffering divine wrath at the hands of his Father." The Father and Son act in unified love. But Philippe de la Trinité's underlying point is important: the atonement must be understood as an act of love, not an act of divine rage. On this, Catholics and thoughtful Protestants can agree.

Aquinas himself put it beautifully. Because Christ suffered and died, "man knows thereby how much God loves him, and is thereby stirred to love Him in return, and herein lies the perfection of human salvation."⁴¹ Notice how Aquinas integrates what Anselm and Abelard tended to separate: the cross is both an objective satisfaction and a demonstration of love that transforms us. For Aquinas, these are not competing explanations. They are complementary dimensions of a single, infinitely rich event.

Philippe de la Trinité, drawing on Aquinas, insists that Christ's sufferings "are not punishments. They are a pure offering of love." As he puts it, "The eternal Father did not step out of character to pummel his beloved Son. Rather, as Aquinas put it, the Father inspired the Son 'with the will to suffer for us.'"⁴² Aquinas further explained the superabundant sufficiency of Christ's sacrifice:

Christ gave more to God than was required to compensate for the offense of the whole human race. First of all, because of the exceeding charity from which He suffered; secondly, on account of the dignity of His life which He laid down in atonement, for it was the life of one who was God and man; thirdly, on account of the extent of the Passion, and the greatness of the grief endured.... And therefore Christ's Passion was not only a sufficient but a superabundant atonement for the sins of the human race.⁴³

This is magnificent theology. Notice the three reasons Aquinas gives for the superabundant value of Christ's sacrifice: the love from which he suffered, the dignity of his person, and the extent of his grief. All three are essential. Christ's death is sufficient not merely because of its legal or judicial weight (though it has that), but because of the love that drives it and the person who offers it.

Aquinas and the Penal Dimension

It is important to note that Aquinas did not entirely exclude the penal dimension from his account. Allen reports that Peter Lombard, the great theological textbook writer of the later medieval period, "agreed with Anselm regarding satisfaction; but he, unlike Anselm, viewed it as penal substitution."⁴⁴ And Aquinas himself "likewise affirmed a penal satisfaction component in the atonement."⁴⁵ The idea that the penal dimension of the atonement was a purely Protestant invention with no precedent before Luther simply does not stand up to historical scrutiny. The seeds were there in the medieval tradition — in Lombard, in Aquinas, and indeed (as we saw in Chapter 15) in several of the Church Fathers.

Hugo Grotius and the Governmental Theory

Before we leave the medieval and early modern period, we need to examine one more important voice: Hugo Grotius (1583–1645), the Dutch jurist and statesman whose governmental theory of the atonement offered yet another way of understanding the cross.

I include Grotius here rather than in Chapter 18 (which covers the post-Reformation period more broadly) because his theory has been so influential in shaping how many Christians understand the atonement, and because understanding Grotius helps us see the range of possibilities that emerged from the medieval conversation about the cross.

Grotius's Argument

Grotius was writing in the early seventeenth century to counter the attack of the Socinians — followers of Faustus Socinus, who had launched the first systematic assault on the objectivity of the atonement (an assault we will examine more fully in Chapter 18). The Socinians argued that punishment cannot be transferred from the guilty to the innocent, that if Christ paid the penalty then forgiveness is unnecessary, and that PSA makes God's mercy and justice contradictory.

Grotius responded with what became known as the "governmental" or "rectoral" theory. His key idea was to view God not primarily as the offended party (as in Anselm) or as the judge passing sentence (as in the Reformers), but as the supreme moral ruler of the universe. God's primary concern in the atonement, Grotius argued, is not the satisfaction of retributive justice per se but the upholding of the moral order — the public demonstration that sin cannot be overlooked and that God is serious about justice.

Stott provides a helpful summary of Grotius's position. He "saw God neither as the offended party nor as creditor nor even as judge, but as the Supreme Moral Governor of the world. So public justice was more important to him than retributive justice, and it was this in particular which he believed was satisfied at the cross."⁴⁶ For Grotius, Christ's death was a public demonstration of God's commitment to the moral order — a signal to the entire universe that God does not take sin lightly.

Was Grotius Really Departing from PSA?

Here is where the story gets more interesting than many textbooks acknowledge. The standard account of Grotius presents him as offering a rival to penal substitution — a less retributive, more forward-looking explanation that focuses on deterrence and the maintenance of moral order rather than on the satisfaction of divine justice. But recent scholarship, particularly the work of Garry Williams, has challenged this reading.

Allen summarizes Williams's findings: "Contrary to many, Grotius did not think that punishment arises from the exigencies of divine governance rather than from the nature of God Himself. Grotius stands solidly with the Reformers in the belief that Jesus bore the very punishment deserved by all sinners."⁴⁷ Williams found clear evidence of Grotius's affirmation of penal substitution. For example, Grotius wrote that God "decided that Christ, willingly and because of his love for mankind, should pay the penalty for our sins by undergoing the most severe tortures and a bloody and disgraceful death. Thus, the demonstration of divine justice would remain unaffected and we, through the intervention of true faith, would be liberated from the punishment of eternal death."⁴⁸

Williams concludes that Grotius "plainly set out here to defend the Penal doctrine, and he remains faithful to his purpose throughout the work."⁴⁹ Williams further argues that "the tradition of reading his doctrine of the atonement as a departure from the Protestant inheritance is thus only reliable at two points of comparison — in his isolation of the doctrine of the atonement, and in his increased emphasis on the conception of God as Ruler in explaining that doctrine."⁵⁰

In other words, Grotius was not abandoning PSA. He was supplementing it with an additional emphasis — the idea that the cross also served to uphold the public moral order of the universe. This is not, I would suggest, a rival to PSA but an additional dimension of what the cross accomplishes. The cross satisfies divine justice (PSA), demonstrates divine love (moral influence), defeats the powers of evil (Christus Victor), and upholds the moral government of God (governmental theory). All of these are genuine facets of a multi-dimensional reality.

Evaluating the Governmental Theory

The governmental theory, properly understood, makes a genuine contribution. It highlights the cosmic and public dimension of the cross. Christ's death is not merely a private transaction between God and the sinner. It is a public event with cosmic significance — a declaration before the entire created order that God is just, that sin matters, and that the moral structure of the universe will not be compromised. Paul seems to be making a similar point in Romans 3:25–26 when he says that God put Christ forward as a propitiation "to show his righteousness" — not merely to effect a private transaction but to make a public display of his justice (as we examined in depth in Chapter 8).

However, if the governmental theory is taken as a replacement for PSA — if we say that the cross is only about upholding the moral order and not about genuinely satisfying divine justice — then it falls short. As several critics have pointed out, if Christ's death is merely a "distinguished example" of God's seriousness about sin (to use Grotius's own phrase), then we are left with a God who inflicts terrible suffering on his Son not because justice actually requires it but merely to make a point. That seems, if anything, more morally problematic than a straightforward account of justice being satisfied.

The governmental theory works best when it is understood as an additional dimension of the atonement rather than a standalone replacement. The cross does uphold God's moral government. It does publicly demonstrate divine justice. But it does these things precisely because something real is happening there — real sin is being dealt with, real justice is being satisfied, and real substitution is taking place.

The Devotion to the Passion: A Note on Medieval Piety

Before we conclude, it is worth pausing to notice an important development in medieval Christianity that ran alongside (and sometimes in tension with) the theological theories we have been examining: the rise of what Aulén calls "Devotion to the Passion," or Passion-mysticism.⁵¹

While the scholastic theologians debated the mechanics of how the cross "worked," ordinary medieval Christians were drawn to contemplate the sufferings of Christ with deep emotional devotion. Thomas à Kempis, in his famous Imitation of Christ, wrote: "The whole life of Christ was a cross and a martyrdom." The attitude of the devout Christian was meditatio et imitatio — meditation on the unspeakable sufferings of Christ and imitation of his self-giving love. As Aulén observes, "The appeal of the passion, the martyrdom of Christ, has never been so deeply felt as in medieval religion."⁵²

This devotional movement served as both "a complement to the Latin doctrine of the Atonement and a counterpoise to it."⁵³ It was a complement because it filled in the emotional and spiritual dimensions that Anselm's strictly rational approach tended to leave out. It was a counterpoise because its emphasis on compassion, identification with Christ's suffering, and personal transformation bore a much closer resemblance to Abelard's approach than to Anselm's.

We can see this tension reflected in medieval art. The triumph-crucifix of the earlier period — which depicted Christ as a victorious king, reigning from the cross — was gradually replaced by the crucifix that depicted the human sufferer, broken and bleeding. The note of triumph that had characterized the patristic Christus Victor theology was muted, replaced by a focus on the depth of Christ's agony and the love it revealed.

This shift in devotional practice matters for our purposes because it shows that the medieval church, even when its formal theology was dominated by Anselm's satisfaction framework, continued to feel the pull of other dimensions of the cross. The devotion to the Passion recognized what the scholastic theories sometimes missed: the cross is not only a problem to be solved by rational theology but a mystery to be contemplated with the heart. The suffering of Christ calls for not just intellectual understanding but personal devotion, gratitude, and imitation.

The Classic Idea Survives: Christus Victor in the Middle Ages

Despite the dominance of the Anselmian satisfaction framework in medieval theology, the older Christus Victor themes did not entirely disappear. As Aulén points out, "It would be wrong to infer that the classic idea of the Atonement had been wholly lost. It was far too deep-rooted and powerful to disappear altogether; and it still lived on in hymnody and in art."⁵⁴

The Easter liturgy remained a stronghold of the dramatic, victory-oriented understanding of the cross. The Easter sequence Victimae paschali, which the Roman missal retained, set forth the conflict of Life with Death and the triumph of the Prince of Life. Other examples of this victory language could be found in the hymns of Adam of St. Victor and in the mystery plays that dramatized the conflict between Christ and the devil.⁵⁵

This survival of the Christus Victor tradition alongside the Anselmian satisfaction theory is significant. It shows that the church's instinct has always been broader than any single theory. Even when one model dominated the formal theology of the academy, the other models continued to find expression in worship, art, and devotion. As we will argue more fully in Chapter 21 (on Christus Victor) and Chapter 24 (on integration), the multiple facets of the atonement resist reduction to any single framework. Substitution, satisfaction, victory, and moral transformation all find their voice in the church's worship — even when the theologians of a particular era have tried to privilege one model over the others.

Pulling It All Together: What the Medieval Period Teaches Us

What can we learn from this remarkable period of theological development? I want to highlight several lessons that are directly relevant to the argument of this book.

First, Anselm was right that the atonement must satisfy something in God's own nature. Whatever we may think of his feudal language or his specific concept of "honor," his fundamental insight remains powerfully true: sin is not a trivial matter that God can simply overlook. It is an offense against the infinite God that must be dealt with. Any account of the atonement that treats sin lightly or suggests that God can forgive without any cost has "not yet considered the weight of sin." This conviction is the foundation on which all subsequent substitutionary atonement theology has been built.

Second, Abelard was right that the cross must transform us. The atonement is not merely an abstract legal transaction. It is a demonstration of divine love that is meant to awaken responsive love in us. Any account of the atonement that focuses exclusively on the objective dimension — what happens between God and Christ — while ignoring the subjective dimension — what happens in us — is incomplete. The cross changes our legal standing before God (justification) and it changes our hearts (sanctification).

Third, Aquinas was right that the atonement has multiple dimensions. His refusal to reduce the cross to a single explanatory category — his insistence that it is simultaneously satisfaction, sacrifice, redemption, example, and victory — is a model for how we should approach this doctrine. The cross is too great, too deep, and too rich to be captured by any one theory. As I will argue in Chapter 24, the best approach is a multi-faceted model with substitution at the center and the other models arranged around it as complementary dimensions.

Fourth, the medieval period shows us both the power and the limitations of cultural context. Anselm's feudal language shaped his theology in ways that were both helpful and unhelpful. The concept of offended honor was meaningful in his context but feels foreign in ours. The Reformers would later translate Anselm's insights into the language of justice and law — categories that were more biblical and more universal. Every theological formulation bears the marks of its cultural moment, and each generation must do the work of expressing the unchanging truth of the gospel in language that communicates clearly.

Fifth, the transition from Anselm to the Reformers — from satisfaction to penal substitution — was a genuine advance. The Reformers did not simply repeat Anselm. They took his core insight and deepened it by incorporating the explicitly penal and substitutionary language of the Bible. Where Anselm spoke of Christ offering a positive compensation to restore God's honor, the Reformers spoke of Christ bearing the actual penalty of sin in our place. This shift was driven by careful attention to the biblical text — especially Isaiah 53, the Pauline epistles, and the Epistle to the Hebrews — and it produced a more complete and more biblically faithful account of what happened at the cross. We will trace this development in detail in Chapter 17.

Conclusion

The medieval period was a time of extraordinary theological creativity. The great minds of this era — Anselm, Abelard, Aquinas, and later Grotius — grappled with the deepest questions about the death of Christ and left us with insights that continue to shape our thinking today.

Anselm's satisfaction theory was a landmark achievement. By grounding the necessity of the atonement in God's own nature rather than in the devil's power, by taking the gravity of sin with radical seriousness, and by showing that only the God-man could bridge the gap between divine demand and human incapacity, Anselm laid the foundation for everything that would follow. His weaknesses — the feudal cultural framework, the absence of a genuinely penal dimension, the discontinuity in divine action — would be addressed by later theologians, but his core insight remains indispensable.

Abelard's moral influence theory, for all its inadequacies as a standalone account, preserved a vital truth: the cross is a revelation of divine love that must transform us. The cross is not merely something to be analyzed; it is something to be loved, wondered at, and responded to with our whole being.

Aquinas's multi-faceted approach anticipated the very kind of integrative model that I believe best accounts for the full biblical data. And Grotius's governmental theory, properly understood, adds the important public and cosmic dimension — reminding us that the cross is not merely a private transaction but a declaration before the entire universe that God is just and that sin has been decisively dealt with.

As we turn in the next chapter to the Reformation — to Luther, Calvin, and the explicit articulation of penal substitutionary atonement — we will see how the Reformers built on the medieval foundation and brought the doctrine of the atonement to a new level of biblical depth and theological precision. The story of the cross was about to enter its next great chapter.

Bibliography

Allen, David L. The Atonement: A Biblical, Theological, and Historical Study of the Cross of Christ. Nashville: B&H Academic, 2019.

Anselm of Canterbury. Cur Deus Homo? In St. Anselm: Basic Writings. Translated by S. N. Deane. 2nd ed. La Salle, IL: Open Court, 1962.

Aulén, Gustaf. Christus Victor: An Historical Study of the Three Main Types of the Idea of Atonement. Translated by A. G. Hebert. Eugene, OR: Wipf & Stock, 2003.

Craig, William Lane. Atonement and the Death of Christ: An Exegetical, Historical, and Philosophical Exploration. Waco, TX: Baylor University Press, 2020.

Grotius, Hugo. Defensio fidei Catholicae de satisfactione Christi. 1617.

McNall, Joshua. The Mosaic of Atonement: An Integrated Approach to Christ's Work. Grand Rapids: Zondervan Academic, 2019.

Philippe de la Trinité. What Is Redemption? How Christ's Suffering Saves Us. Steubenville, OH: Emmaus Road, 2021.

Rutledge, Fleming. The Crucifixion: Understanding the Death of Jesus Christ. Grand Rapids: Eerdmans, 2015.

Stott, John R. W. The Cross of Christ. Downers Grove, IL: InterVarsity Press, 2006.

Thomas Aquinas. Summa Theologiae. Part III.