Appendix C: Glossary of Key Terms

From "The Cross at the Center: A Biblical, Theological, Historical, and Philosophical Study of Substitutionary Atonement"

How to Use This Glossary: This glossary defines the major theological, biblical, and philosophical terms used throughout this book. Where a term derives from Greek or Hebrew, the transliterated form is given first, followed by the original script in parentheses. Each definition is written in plain language that any reader can understand, while preserving the precision needed for serious theological study. Cross-references to other glossary entries appear in italics. References to the chapter(s) where the term is discussed in depth appear at the end of each entry.

A phrase used by the Church Fathers and in later theology to describe the great exchange at the heart of the atonement: Christ takes what is ours (sin, death, curse) and gives us what is His (righteousness, life, blessing). The classic expression of this idea is found in 2 Corinthians 5:21: "For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God." The concept appears in both Eastern and Western Christianity. In the East, it is closely related to theosis (the idea that God became what we are so that we might become what He is). In the West, it is tied to the doctrine of imputation — Christ's righteousness credited to the believer. The wonderful exchange is broader than any single atonement theory; it describes the result of Christ's work from multiple angles simultaneously.

A Greek preposition meaning "in place of," "instead of," or "in exchange for." When used in connection with Christ's death, anti carries a strongly substitutionary force: one thing takes the place of another. The most important use in atonement theology is in Mark 10:45 and Matthew 20:28, where Jesus says He came to give His life "as a ransom anti pollōn" — "a ransom in place of many." Some scholars have attempted to soften anti to mean merely "on behalf of," but its primary meaning in Greek is clearly "instead of" or "in exchange for." The word is also used in the compound antilytron (1 Tim. 2:6), which intensifies the substitutionary idea: a "ransom-in-exchange-for" all people.

The Hebrew word for the "guilt offering" or "reparation offering," one of the five main offerings in the Levitical sacrificial system (Lev. 5:14–6:7; 7:1–10). The guilt offering was required when someone trespassed against God's holy things or defrauded a neighbor. It involved both a sacrifice and restitution — the offender had to make things right and also offer an animal. The guilt offering is theologically significant because Isaiah 53:10 says that the Suffering Servant makes his life "an ʾāšām" — a guilt offering. This connects the Servant's death directly to the Levitical sacrificial system and suggests that His death functions as reparation for the sins of others. The use of this specific term in Isaiah 53 is one of the strongest Old Testament indicators that the Servant's death is substitutionary and sacrificial.

In its broadest sense, atonement refers to the means by which the broken relationship between God and humanity is repaired. The English word "atonement" has sometimes been explained as "at-one-ment" — the process by which God and sinful humans are made "at one" again. In Christian theology, atonement specifically refers to the saving work of Jesus Christ, especially His death on the cross, by which He dealt with the problem of human sin and made it possible for people to be reconciled to God. The atonement is the central doctrine of the Christian faith and the subject of this entire book. Throughout church history, theologians have developed multiple models or theories to explain how Christ's death achieves this reconciliation — including substitutionary atonement, Christus Victor, satisfaction, moral influence, recapitulation, and the governmental theory. This book argues that these are not competing theories but complementary facets of a multi-dimensional reality, with substitution at the center.

See also: Substitution, Penal Substitution, Christus Victor, Satisfaction, Moral Influence Theory, Reconciliation. Discussed in all chapters, especially Chapter 1.

A Hebrew term found in Leviticus 16:8, 10, 26, traditionally translated as "scapegoat." On the Day of Atonement (Yom Kippur), two goats were selected. One was sacrificed as a sin offering, and the other — designated "for ʿăzāʾzēl" — had the sins of Israel confessed over its head by the high priest, after which it was sent away into the wilderness, symbolically carrying the people's sins far away. The meaning of ʿăzāʾzēl is debated. Some scholars understand it as the name of a desert demon or fallen angel to whom the goat was sent. Others interpret it as a description of the goat itself — "the goat that departs" (i.e., the "escape goat" or scapegoat). Still others take it as a geographical term for a remote, desolate place. Regardless of the precise etymology, the ritual dramatizes the removal and bearing away of sin — a vivid Old Testament picture of what Christ accomplishes on the cross.

The Hebrew word for "sin offering" or "purification offering" (Lev. 4:1–5:13). The chaṭṭāʾt was the sacrifice prescribed for unintentional sins and for ritual purification. The animal was killed, and its blood was applied to the altar (and on the Day of Atonement, to the mercy seat) to make atonement. The chaṭṭāʾt cleansed both the sinner and the sanctuary from the defilement caused by sin. In the Greek translation of the Old Testament (the Septuagint), the phrase for the sin offering is peri hamartias, which is the same phrase Paul uses in Romans 8:3 when he says God sent His Son "for sin" (peri hamartias) — a probable allusion to Christ's death as the ultimate sin offering.

A model of the atonement that emphasizes Christ's victory over the powers of evil — sin, death, and the devil. In this view, the cross and resurrection are primarily a cosmic battle in which Christ defeats the spiritual forces that hold humanity captive. The Christus Victor model was prominently revived in the twentieth century by Swedish theologian Gustaf Aulén in his influential 1931 book of the same name. Aulén argued that this "classic" or "dramatic" view was the dominant understanding of the early Church Fathers and was later recovered by Martin Luther, before being displaced by the "Latin" satisfaction and penal substitution theories. Key biblical texts include Colossians 2:13–15, Hebrews 2:14–15, and 1 John 3:8. This book affirms that Christus Victor captures a genuine and important dimension of what Christ accomplished but argues that it is insufficient by itself. Victory over evil and substitutionary sin-bearing are not competing ideas; they are complementary aspects of the same saving event. Christ wins the victory precisely by bearing our sins and defeating death from within.

See also: Atonement, Ransom, Recapitulation. Discussed in Chapters 1, 13, 14, 15, 18, 21, 24.

The title of Anselm of Canterbury's famous treatise, written around 1098, which asks why the incarnation and death of Christ were necessary. Anselm argued that human sin is an offense against God's infinite honor. Because the offense is infinite (directed against an infinite being), no finite creature can make adequate reparation — only a being who is both human (to represent humanity) and divine (to offer infinite satisfaction) can restore God's honor. Christ's death provides this satisfaction. Anselm's satisfaction theory was a major development in atonement theology and paved the way for the later Reformation doctrine of penal substitution, though the two are not identical. Anselm speaks of satisfaction of honor, not of punishment for guilt. Critics note that Anselm's framework reflects medieval feudal concepts of honor, but defenders argue that his core insight — that sin requires a response commensurate with God's infinite worth — is biblically grounded.

The holiest day in the Jewish calendar, described in Leviticus 16. On this day, and this day alone, the high priest entered the Holy of Holies — the innermost chamber of the tabernacle (and later the temple) — to sprinkle the blood of a sacrificial goat on the kapporeth (mercy seat) to make atonement for the sins of the entire nation. A second goat, the scapegoat (ʿăzāʾzēl), had the sins of Israel confessed over its head and was then sent into the wilderness, symbolically bearing the people's sins away. The Day of Atonement is the single most important Old Testament background for understanding the death of Christ. The Epistle to the Hebrews interprets Jesus' death and heavenly ministry as the fulfillment of the Day of Atonement — He is both the true high priest who enters the heavenly Holy of Holies and the perfect sacrifice whose blood secures "eternal redemption" (Heb. 9:12).

See also: ʿĂzāʾzēl, Kapporeth, Kipper, Hilastērion. Discussed in Chapters 5, 8, 10.

The Greek noun meaning "justification" or "vindication." In Pauline theology, justification is the legal declaration by God that a sinner is righteous — not because of anything the person has done, but because the righteousness of Christ has been credited (imputed) to them through faith. Justification is forensic (it is a courtroom verdict, not a description of the person's inner moral state) and is grounded in the atoning death of Christ. Romans 4:25 says Christ "was delivered up for our trespasses and raised for our justification (dikaiōsis)." Justification is one of the primary benefits of the atonement and is the direct result of penal substitution: because Christ bore the penalty for sin, God can justly declare sinners righteous (Rom. 3:26). The related noun dikaiosynē (righteousness) and the verb dikaioō (to justify) are central to Paul's argument in Romans and Galatians.

See also: Dikē/Dikaiosynē, Imputation, Penal Substitution. Discussed in Chapters 8, 36.

Dikē / Dikaiosynē (Greek: δίκη / δικαιοσύνη) — Justice / Righteousness

Two related Greek terms central to the Bible's discussion of God's character and the atonement. Dikē means "justice," "penalty," or "punishment" and refers broadly to the moral order that God upholds. Dikaiosynē means "righteousness" or "justice" and is used in two senses: (1) as an attribute of God — His righteous, just character; and (2) as a status given to believers — the righteousness they receive through faith in Christ. In Romans 3:25–26, Paul says that God put Christ forward as a hilastērion "to show his righteousness (dikaiosynē)... so that he might be just (dikaios) and the justifier of the one who has faith in Jesus." The cross demonstrates both that God takes sin seriously (His justice) and that He freely forgives sinners (His mercy). The atonement holds divine justice and divine mercy together without sacrificing either.

See also: Dikaiōsis, Divine Justice, Retributive Justice, Restorative Justice. Discussed in Chapters 3, 8, 26.

The attribute of God by which He upholds moral order, rewards righteousness, and responds to sin with appropriate consequences. In the context of atonement theology, divine justice is the reason the cross was necessary: God could not simply overlook sin without undermining His own righteous character. However, the nature of divine justice is debated. Some theologians emphasize retributive justice (God must punish sin because sin deserves punishment), while others emphasize restorative justice (God's aim is always to heal and restore, not merely to punish). This book argues that both dimensions are real but that God's justice is always exercised within the context of His love. At the cross, God's justice and God's love are not in conflict; they converge. The cross satisfies the demands of justice while simultaneously being the supreme expression of divine love.

See also: Retributive Justice, Restorative Justice, Wrath of God. Discussed in Chapters 3, 8, 25, 26.

The removal, cleansing, or wiping away of sin and its defilement. Expiation focuses on what happens to sin itself — it is covered, purged, or taken away. This stands in contrast to propitiation, which focuses on the effect of sacrifice on God (turning aside or satisfying His wrath). In the mid-twentieth century, C.H. Dodd famously argued that the Greek word hilastērion in Romans 3:25 should be translated as "expiation" (sin-removal) rather than "propitiation" (wrath-averting). Leon Morris and others responded that in its biblical context, the word carries both dimensions: Christ's sacrifice both removes sin (expiation) and turns aside the just consequences of God's righteous response to sin (propitiation). This book affirms both: the atonement is both expiatory (it deals with sin itself) and propitiatory (it addresses God's righteous judgment against sin). The two are not competing ideas but two sides of the same coin.

The theological concept that one person can serve as the official representative of a larger group, so that the representative's actions count for (or are credited to) the whole group. The term "federal" comes from the Latin foedus (covenant). In atonement theology, federal headship explains how Christ's death can count for others: just as Adam, as the head of the human race, brought sin and death to all his descendants (Rom. 5:12–21), so Christ, as the new head of redeemed humanity, brings righteousness and life to all who are united to Him by faith. Federal headship is central to the logic of both imputation and substitution: Christ can bear our sins and we can receive His righteousness because He stands as our covenant representative. Critics object that one person's actions should not count for another (the problem of punishment transfer), but defenders respond that representative solidarity is deeply embedded in both Scripture and human experience.

See also: Imputation, Substitution, Corporate Solidarity. Discussed in Chapters 9, 25, 27, 28.

An atonement theory developed by the Dutch jurist Hugo Grotius (1583–1645). According to this view, Christ did not die to bear the specific penalty for human sin (as in penal substitution) but rather to uphold the moral governance and justice of God. Christ's suffering was a demonstration that God takes sin seriously, maintaining the integrity of divine law without requiring the exact punishment that sinners deserve. In other words, Christ's death is not a payment of the penalty but a display that preserves moral order, allowing God to forgive without appearing to be indifferent to sin. The governmental theory has been influential in Wesleyan and Arminian traditions. Critics from the Reformed tradition argue that it weakens the biblical emphasis on Christ actually bearing the penalty of sin, while critics from the opposite direction argue that it still relies on a punitive framework. This book engages the governmental theory as one model among several but argues that it fails to account for the full substitutionary and penal language of Scripture.

See also: Atonement, Penal Substitution, Satisfaction. Discussed in Chapters 18, 22.

The most common Greek word for "sin" in the New Testament. It carries the basic meaning of "missing the mark" — falling short of God's standard. Paul uses hamartia in two significant ways: (1) as individual acts of wrongdoing (sins in the plural), and (2) as a ruling power or principle — Sin (capital S) as a force that enslaves humanity (as in Romans 5–8, where Sin is personified as a tyrant). This dual usage is important for atonement theology because Christ's death addresses both dimensions: He bears the consequences of our individual sins (the forensic/penal dimension) and He defeats the power of Sin as a cosmic force (the Christus Victor dimension). In 2 Corinthians 5:21, God made Christ "to be sin (hamartia)" — a stunning statement that Christ so identified with human sin that the sin itself was placed upon Him.

See also: Atonement, Christus Victor, Penal Substitution. Discussed in Chapters 2, 8, 9.

A Greek noun meaning "propitiation" or "atoning sacrifice," used in 1 John 2:2 and 4:10. In 1 John 2:2, the apostle writes that Jesus "is the propitiation (hilasmos) for our sins, and not for ours only but also for the sins of the whole world." This verse is important for two reasons: it identifies Christ Himself (not merely His death) as the atoning sacrifice, and it extends the scope of this sacrifice to "the whole world" — one of the strongest texts for unlimited atonement. The debate over whether hilasmos means "propitiation" (turning aside wrath) or "expiation" (removing sin) parallels the debate over hilastērion. This book affirms that both meanings are present.

See also: Hilastērion, Propitiation, Expiation, Unlimited Atonement. Discussed in Chapters 2, 12, 30.

One of the most debated Greek words in the New Testament, found in Romans 3:25 where Paul says God put forward Christ as a hilastērion "by his blood." Three main translations have been proposed: (1) "propitiation" — a sacrifice that turns aside God's wrath (favored by Leon Morris, the ESV, and many evangelical scholars); (2) "expiation" — a sacrifice that removes or cleanses sin (favored by C.H. Dodd and the RSV); (3) "mercy seat" — a reference to the kapporeth, the lid of the Ark of the Covenant where blood was sprinkled on the Day of Atonement (favored by some scholars because hilastērion is the Septuagint translation of kapporeth). This book argues that all three dimensions are present: Christ is the true mercy seat, the place where God and sinful humanity meet; His blood both removes sin (expiation) and addresses the just consequences of God's righteous judgment against sin (propitiation). The term encapsulates the full reality of the atonement in a single word.

See also: Propitiation, Expiation, Kapporeth, Day of Atonement. Discussed in Chapters 2, 5, 8.

A Greek preposition meaning "on behalf of," "for the sake of," or "in place of." This is the most frequently used preposition in the New Testament to describe the purpose and beneficiaries of Christ's death — "Christ died hyper us" (Rom. 5:8; 2 Cor. 5:14–15; 1 Thess. 5:10; etc.). The meaning of hyper is debated. Some scholars argue it means only "on behalf of" or "for the benefit of" — describing a beneficial action without necessarily implying substitution. Others, including Simon Gathercole, argue that in the context of Christ's death, hyper carries a substitutionary force — "in our place" — especially when combined with the language of sin-bearing and curse-bearing. This book agrees with Gathercole that the broader context of these passages establishes the substitutionary meaning. Christ did not merely die "for our benefit" in some vague sense; He died in our place, bearing what we should have borne.

The doctrine, defined at the Council of Chalcedon (451 AD), that Jesus Christ is one person (one hypostasis) with two complete natures — fully divine and fully human — without confusion, change, division, or separation. The hypostatic union is essential for atonement theology for several reasons: (1) Christ must be truly human to represent humanity and to die as our substitute; (2) Christ must be truly divine for His sacrifice to have infinite value and efficacy; (3) the unity of Christ's person means that the one who died on the cross was truly God in human flesh — this is what makes the atonement God's own self-substitution, not the punishment of a third party. As John Stott argued, the doctrine of the self-substitution of God depends on the hypostatic union: it is God Himself who, in the person of His incarnate Son, bears the consequences of our sin.

The act of crediting or reckoning something to someone's account. In atonement theology, imputation operates in two directions: (1) our sins are imputed (credited) to Christ — He is treated as though He bore the guilt of our sins, even though He Himself was sinless; and (2) Christ's righteousness is imputed (credited) to us — believers are declared righteous before God, not because of their own moral performance, but because Christ's perfect righteousness is counted as theirs through faith. The classic text is 2 Corinthians 5:21: God made Christ "to be sin" (our sin imputed to Him) "so that in him we might become the righteousness of God" (His righteousness imputed to us). Imputation is a forensic (legal) concept. It does not mean that Christ literally became a sinner or that believers become morally perfect; it means that in God's courtroom, the legal status is transferred. This is the "great exchange" (admirabile commercium) at the heart of the gospel.

See also: Admirabile Commercium, Dikaiōsis, Federal Headship. Discussed in Chapters 8, 9, 19, 27, 28, 36.

The central Christian doctrine that the eternal Son of God — the second Person of the Trinity — took on human nature and became a real human being in the person of Jesus of Nazareth, while remaining fully divine. The incarnation is described in John 1:14: "The Word became flesh and dwelt among us." The incarnation is the necessary precondition for the atonement. God did not save humanity from a distance; He entered into the human condition personally. By becoming human, the Son of God was able to represent humanity, to live the sinless life that we could not live, and to offer Himself as a sacrifice on our behalf. Every theory of the atonement depends on the incarnation — whether the emphasis falls on substitution, victory, satisfaction, recapitulation, or moral influence. Without the incarnation, there is no atonement.

See also: Hypostatic Union, Trinity, Recapitulation. Discussed in Chapters 1, 16, 19, 20, 23, 25.

The "mercy seat" — the golden lid that sat atop the Ark of the Covenant in the Holy of Holies (Exod. 25:17–22). On the Day of Atonement, the high priest sprinkled the blood of the sacrificial goat on and before the kapporeth to make atonement for the sins of Israel (Lev. 16:14–16). The kapporeth was the place where God's presence met the blood of atonement — the point of contact between a holy God and sinful humanity. In the Septuagint (the Greek translation of the Old Testament), kapporeth is translated as hilastērion — the same word Paul uses in Romans 3:25 to describe Christ. This connection suggests that Paul may be presenting Christ as the true mercy seat — the place where God and humanity are reconciled through blood.

See also: Day of Atonement, Hilastērion, Kipper. Discussed in Chapters 2, 5, 8.

The Hebrew verb meaning "to atone," "to make atonement," "to cover," or "to purge." This is the central verb for atonement in the Old Testament. Its precise meaning is debated: the traditional view connects it to the root meaning "to cover" (God covers or hides sin from His sight); more recent scholarship has connected it to the Akkadian kuppuru, meaning "to wipe clean" or "to purge." In either case, kipper describes the action by which sin is dealt with through sacrifice so that the relationship between God and humanity can be restored. The noun form, kippurim, gives us the name for the Day of Atonement: Yom Kippurim. The related noun kōpher means "ransom" — a payment given in place of a life (Exod. 21:30; 30:12). Together, the kipper word family ties the concepts of atonement, covering, purging, and ransom into a single semantic network.

The doctrine, also called "particular redemption" or "definite atonement," that Christ's atoning death was intended only for the elect — those whom God has predestined to salvation — rather than for all people universally. Limited atonement is the "L" in the Calvinist TULIP acronym and is defended by many Reformed theologians. It is based on the argument that if Christ actually bore the sins of all people, then all people would be saved (since their sins have already been paid for); since not all are saved, Christ must have died only for the elect. This book rejects limited atonement and defends unlimited atonement — the view that Christ died for all people without exception, that the atonement is sufficient and intended for all, and that its benefits are applied to those who respond in faith. Key texts cited against limited atonement include 1 John 2:2 ("not for ours only but also for the sins of the whole world"), 1 Timothy 2:6, 2 Peter 2:1, and Hebrews 2:9.

See also: Unlimited Atonement, TULIP, Universal Scope. Discussed in Chapters 30, 31.

Greek terms for "ransom" and "ransom in exchange for." Lytron is used by Jesus in Mark 10:45 (and the parallel in Matt. 20:28): "The Son of Man came... to give his life as a lytron for many" — a price paid to liberate captives. The compound antilytron, found only in 1 Timothy 2:6, intensifies the substitutionary meaning: Christ gave Himself as "a ransom in exchange for (antilytron hyper) all." The anti- prefix adds a clear substitutionary force — this is not just a ransom paid generally; it is a ransom given in the place of those being freed. Together, these terms are among the most important New Testament vocabulary for the atonement, combining the ideas of liberation, cost, and substitution.

An atonement theory usually associated with Peter Abelard (1079–1142), though Abelard's actual view was more nuanced than the label suggests. In its classic form, the moral influence theory holds that the primary purpose of Christ's death was not to pay a penalty or satisfy divine justice but to reveal the depth of God's love in a way that transforms the human heart. When we see how much God loves us — enough to send His Son to die — we are moved to repentance, gratitude, and love in return. The cross changes us, not God. The moral influence model captures a genuine biblical truth: the cross is indeed the supreme revelation of divine love (Rom. 5:8; 1 John 4:9–10), and it does transform those who behold it. However, this book argues that the moral influence theory is insufficient on its own. It does not adequately explain how sin is actually dealt with, how guilt is removed, or how justice is satisfied. It describes a subjective effect of the cross on the believer but neglects the objective accomplishment of the cross before God.

See also: Atonement, Satisfaction, Substitution. Discussed in Chapters 1, 16, 18, 22.

A Hebrew word meaning "discipline," "chastisement," "correction," or "instruction." It appears in Isaiah 53:5 — "the mûsār that brought us peace was upon him." The meaning of mûsār here is debated: does it refer to punitive punishment (supporting a penal interpretation of the Servant's suffering), or does it refer to corrective discipline (suggesting a non-penal form of suffering)? The word is used elsewhere in the Old Testament for both parental discipline and divine correction (Prov. 3:11; Deut. 11:2). In the context of Isaiah 53, where the Servant bears our griefs, carries our sorrows, is pierced for our transgressions, and is crushed for our iniquities, the word carries at minimum a judicial nuance — the suffering that should have fallen on us fell instead on Him, and the result is our peace (shalom, wholeness, well-being).

See also: ʾĀšām, Nāśāʾ, Penal Substitution. Discussed in Chapters 6, 19, 32.

A Hebrew verb meaning "to bear," "to carry," or "to take up." It is used in two theologically important senses in the Old Testament: (1) to bear sin — that is, to carry the guilt and consequences of wrongdoing (Lev. 5:1, 17; Num. 14:34; Ezek. 18:20); and (2) to bear sin away — that is, to take away or forgive sin (Exod. 34:7; Mic. 7:18). When Isaiah 53:4 says the Servant "has borne (nāśāʾ) our griefs" and 53:12 says "he bore (nāśāʾ) the sin of many," the word carries the sense of carrying the burden of sin's consequences — the Servant takes upon Himself what rightly belongs to others. Peter picks up this language in 1 Peter 2:24: "He himself bore (anapherō in Greek) our sins in his body on the tree." The idea of sin-bearing, expressed by nāśāʾ in Hebrew and its Greek equivalents, is at the heart of the biblical case for substitutionary atonement.

The doctrine that Jesus Christ, on the cross, bore the legal penalty that sinful humanity deserved — specifically, the penalty of death and separation from God — as our substitute, in our place. The word "penal" means "relating to penalty or punishment." Penal substitution holds that sin incurs a real judicial penalty from God, and that Christ willingly took that penalty upon Himself so that we could be forgiven. It is the most developed form of substitutionary atonement and has been central to Protestant theology since the Reformation, though substitutionary elements are found much earlier in the Church Fathers. This book affirms that the penal dimension of the atonement is real and important but secondary to the broader category of substitution itself. The emphasis should fall on the fact that Christ stood in our place and bore what we should have borne — the penal dimension describes one aspect of what He bore. Critically, penal substitution must always be understood within the context of the Trinity acting in unified love. The Father did not pour out wrath upon an unwilling victim; the Son voluntarily accepted the judicial consequences of our sin, and the Father was present with Him in love throughout.

See also: Substitution, Atonement, Satisfaction, Wrath of God, Trinity. Discussed in Chapters 1, 2, 8, 9, 14, 15, 17, 18, 19, 20, 24, 25, 32, 33.

A sacrifice or offering that turns aside or satisfies the wrath of God against sin. In pagan religions, propitiation often meant appeasing an angry deity through gifts or sacrifices. But biblical propitiation is fundamentally different: it is God Himself who provides the propitiation. God is not an angry deity who needs to be bribed; He is the loving Father who, at great cost to Himself, provides the sacrifice that addresses His own righteous response to sin. Romans 3:25 says God "put forward" Christ as a hilastērion — the propitiation is God's initiative, not a human attempt to pacify a hostile deity. The debate over whether hilastērion and hilasmos should be translated as "propitiation" (turning aside wrath) or "expiation" (removing sin) has been one of the most significant translation controversies of the twentieth century. This book argues that both dimensions are present and that a false choice between them should be avoided.

See also: Expiation, Hilastērion, Hilasmos, Wrath of God. Discussed in Chapters 2, 8, 12.

A price paid to liberate someone from captivity, slavery, or a death sentence. In the context of the atonement, the ransom motif portrays Christ's death as the price paid to free humanity from bondage to sin, death, and the devil. The key text is Mark 10:45: "The Son of Man came... to give his life as a ransom (lytron) for many." The ransom metaphor raises the question: to whom was the ransom paid? Some early Church Fathers (such as Origen and Gregory of Nyssa) speculated that it was paid to the devil, who held humanity captive. Others (like Gregory of Nazianzus) rejected this as absurd — God owes nothing to the devil. Most modern theologians understand the ransom metaphor as indicating the costliness of redemption (it cost Christ His life) and the freedom it provides (we are liberated from the power and penalty of sin), without pressing the metaphor to identify a specific recipient of payment. The ransom motif overlaps with both the Christus Victor model (liberation from captivity) and substitutionary atonement (a price paid in our place).

See also: Lytron/Antilytron, Redemption, Christus Victor. Discussed in Chapters 2, 7, 13, 14, 22.

Literally, "to sum up" or "to head up again." The concept was developed most fully by Irenaeus of Lyon (c. 130–202 AD) in his work Against Heresies. Irenaeus taught that Christ "recapitulated" — that is, re-enacted, reversed, and summed up — the entire history of humanity in Himself. Where Adam failed at every point, Christ succeeded. Christ relived the human story from birth to death, undoing the damage that Adam's fall had caused and bringing the human race back to its original destiny in God. Recapitulation emphasizes the incarnation as much as the crucifixion: Christ saves by becoming what we are (human) and living the whole human life faithfully, so that in Him, humanity is restored. The concept is closely related to the Eastern Orthodox emphasis on theosis (divinization): as Athanasius famously put it, "He became what we are so that we might become what He is." This book affirms recapitulation as a genuine and valuable dimension of the atonement, complementing rather than competing with substitutionary themes.

See also: Theosis, Christus Victor, Incarnation. Discussed in Chapters 13, 14, 23, 24.

The restoration of a broken relationship — specifically, the restoration of peace between God and sinful humanity through the death of Christ. The key passage is 2 Corinthians 5:18–20: "God was in Christ reconciling the world to himself, not counting their trespasses against them." Reconciliation is one of the major metaphors for the atonement's effect. It emphasizes the relational dimension: sin has alienated us from God, and the cross bridges that gulf. Importantly, Paul says that God reconciles us to Himself — the initiative is God's, not ours. God does not need to be reconciled to us (as if we needed to persuade a reluctant God to love us); rather, God reconciles us to Himself through Christ. Reconciliation is the relational outcome of the atonement; substitution and propitiation describe the means by which it is accomplished.

The act of purchasing freedom for a captive through the payment of a price. The Greek word apolytrōsis literally means "a releasing by payment of a ransom." In the New Testament, redemption is used to describe what Christ accomplished on the cross: He paid the price (His own life) to set humanity free from bondage to sin, death, and the law's condemnation. Key texts include Romans 3:24 ("justified by his grace as a gift, through the apolytrōsis that is in Christ Jesus"), Ephesians 1:7 ("In him we have apolytrōsis through his blood"), and Hebrews 9:12 ("he entered once for all into the holy places... securing an eternal apolytrōsis"). The redemption metaphor draws on the background of both the slave market (purchasing a slave's freedom) and the Old Testament concept of the kinsman-redeemer (gōʾēl) who buys back family members from debt or slavery. Redemption emphasizes both the costliness and the liberating effect of Christ's death.

See also: Ransom, Lytron/Antilytron, Reconciliation. Discussed in Chapters 2, 8, 9, 36.

A view of justice that emphasizes the healing, repair, and restoration of broken relationships and communities rather than the infliction of punishment on wrongdoers. In atonement theology, proponents of restorative justice argue that God's justice is primarily aimed at making things right — restoring the offender, the victim, and the community — rather than at retribution or punishment. This perspective is prominent in Eastern Orthodox theology and in some contemporary critiques of penal substitution. This book affirms that God's justice has a genuinely restorative dimension — the goal of the atonement is ultimately restoration, not destruction. However, it also argues that restorative justice and retributive justice are not mutually exclusive: sin has real consequences that must be addressed, and the cross is where God addresses those consequences so that restoration can occur. The substitutionary death of Christ is the means by which restorative justice is made possible.

See also: Divine Justice, Retributive Justice, Penal Substitution. Discussed in Chapters 26, 33, 34.

The view that justice requires wrongdoers to receive consequences proportionate to their offenses. In atonement theology, retributive justice is the principle that sin deserves and receives a just response from God — not because God is vindictive, but because He is righteous and upholds moral order. Defenders of penal substitution argue that retributive justice is an essential attribute of God and that the cross demonstrates it: Christ bore the retributive consequences of sin so that sinners could go free. Critics (including some in the Eastern Orthodox tradition and many contemporary theologians) argue that retributive justice is a pagan concept incompatible with a God of love, and that restorative justice better reflects the biblical portrait of God. This book takes a mediating position: God's justice is neither purely retributive (mere punishment for its own sake) nor purely restorative (ignoring the real consequences of sin). At the cross, retributive and restorative dimensions converge: the just consequences of sin are borne by Christ (retributive), in order to make possible the full restoration of sinners (restorative).

See also: Divine Justice, Restorative Justice, Wrath of God. Discussed in Chapters 3, 8, 25, 26.

In biblical theology, a sacrifice is an offering presented to God — often involving the death of an animal — for the purposes of atonement, worship, thanksgiving, or communion. The Levitical sacrificial system (Lev. 1–7) prescribed five major types of offerings: the burnt offering (ʿōlâ), the grain offering (minḥâ), the peace offering (šělāmîm), the sin offering (chaṭṭāʾt), and the guilt offering (ʾāšām). These sacrifices did not have inherent power to remove sin (Heb. 10:4, "it is impossible for the blood of bulls and goats to take away sins"); rather, they pointed forward typologically to the perfect sacrifice of Christ. The New Testament presents Christ's death as the ultimate sacrifice that fulfills and supersedes the entire Old Testament sacrificial system. He is both the priest who offers and the lamb who is offered (Heb. 9:11–14). The sacrificial dimension of the atonement is foundational to the substitutionary model: the animal (and ultimately Christ) dies in the place of the offerer.

See also: ʾĀšām, Chaṭṭāʾt, Kipper, Day of Atonement. Discussed in Chapters 4, 5, 6, 10.

An atonement model developed by Anselm of Canterbury in his Cur Deus Homo (c. 1098). Anselm argued that human sin is an offense against God's honor, and that God's honor requires either punishment or satisfaction (compensation). Since humanity cannot offer adequate satisfaction (the offense is against an infinite being), only a God-man — one who is both divine and human — can offer what is required. Christ's death provides this satisfaction, restoring God's honor and enabling forgiveness. Satisfaction theory differs from penal substitution in an important way: Anselm spoke of satisfying God's honor, not of bearing the legal punishment for sin. The Reformers later built upon Anselm's framework but shifted the emphasis from honor to law and penalty. The Catholic theological tradition has developed a sophisticated version of satisfaction — "vicarious satisfaction" — that grounds Christ's offering in love and mercy rather than in punishment. Philippe de la Trinité's work is an important modern representative of this tradition and a key dialogue partner in this book.

See also: Cur Deus Homo, Penal Substitution, Vicarious Satisfaction. Discussed in Chapters 16, 18, 22.

The Hebrew term for the "laying on of hands" performed by the worshiper upon the head of a sacrificial animal before it was slaughtered (Lev. 1:4; 3:2; 4:4; 16:21). The precise theological significance of this ritual gesture is debated. Some scholars understand it as a symbolic transfer of sin or guilt from the offerer to the animal — making the animal a substitute that bears the person's sin. Others argue it symbolizes identification (the offerer identifies with the animal and its fate) or ownership (the offerer is designating this specific animal as their offering). The most dramatic instance of semikah is on the Day of Atonement, when Aaron "shall lay both his hands on the head of the live goat, and confess over it all the iniquities of the people of Israel... putting them on the head of the goat" (Lev. 16:21). This text strongly supports the transfer interpretation: the sins are placed on the goat, which then bears them away.

See also: Day of Atonement, ʿĂzāʾzēl, Sacrifice. Discussed in Chapters 4, 5.

A theological movement named after Faustus Socinus (1539–1604) that rejected several core Christian doctrines, including the Trinity, the deity of Christ, and substitutionary atonement. On the atonement, Socinians argued that God can simply forgive sin by fiat — He does not require any sacrifice or satisfaction. Christ's death, in their view, served primarily as a moral example of obedience and trust in God, not as a payment for sin or a bearing of divine judgment. Socinianism represents the most radical rejection of substitutionary atonement in the history of Christian theology. The Socinian critique forced defenders of orthodox atonement theology to articulate their position more carefully and has continued to influence later objections to PSA, including some modern arguments that God can "just forgive" without requiring any atoning sacrifice. Orthodox theologians have responded that this misunderstands both the nature of sin (which creates real consequences, not just hurt feelings) and the nature of God's justice (which is an essential attribute, not an arbitrary requirement).

See also: Moral Influence Theory, Governmental Theory, Penal Substitution. Discussed in Chapters 18, 25.

The doctrine that Jesus Christ died in our place, bearing what we should have borne, so that we might receive what He deserved. Substitution is the broadest and most fundamental category in this book's atonement theology. It means that Christ stood where we stood — under the weight of sin, death, and judgment — and took upon Himself the consequences that were rightly ours. The specific form of substitution that dominates Protestant theology is penal substitution (Christ bore the legal penalty for sin), but substitution is broader than the penal dimension alone. Christ substituted Himself for us in multiple ways: He bore our sins (1 Pet. 2:24), He became a curse for us (Gal. 3:13), He gave His life as a ransom for many (Mark 10:45), He died the righteous for the unrighteous (1 Pet. 3:18), and He was made sin for us (2 Cor. 5:21). This book argues that substitution — one dying in place of others — is the central and most important facet of the atonement, the theological heart around which all other models (Christus Victor, moral influence, recapitulation, satisfaction) find their proper place.

See also: Penal Substitution, Anti, Hyper, Atonement. Discussed in all chapters, especially Chapters 6, 7, 8, 9, 11, 19, 24, 25.

A phrase coined by Martin Luther to describe a way of doing theology that begins with and is shaped by the cross of Christ. Luther contrasted the theologia crucis with the theologia gloriae ("theology of glory"), which seeks to know God through human reason, natural observation, and impressive works. A theology of the cross, by contrast, recognizes that God reveals Himself most fully not in power and majesty but in weakness, suffering, and apparent defeat — at the cross. This has implications for atonement theology: the cross is not a disaster that God turned into a victory; it is the very means by which God chose to save. The God who reveals Himself in the crucified Christ is a God who enters into suffering, bears the consequences of evil, and overcomes through self-giving love rather than through coercive power. The theologia crucis insists that we must not domesticate or sanitize the cross but confront its scandal and foolishness (1 Cor. 1:18–25).

See also: Atonement, Penal Substitution, Incarnation. Discussed in Chapters 1, 17, 37.

The Eastern Orthodox doctrine that the ultimate purpose of salvation is humanity's participation in the divine nature (2 Pet. 1:4) — not that humans become God in essence, but that they are transformed to share in God's life, love, holiness, and glory through union with Christ by the Holy Spirit. The classic formula, attributed to Athanasius, is: "He became what we are so that we might become what He is" (On the Incarnation). Theosis is closely connected to recapitulation (Christ undoes what Adam did) and to the incarnation (God enters human nature in order to elevate it). In Eastern theology, theosis is the primary lens for understanding salvation, and it is sometimes contrasted with the Western emphasis on forensic justification. This book argues that theosis and substitutionary atonement are not incompatible — they operate on different registers. Substitution addresses the problem of sin's guilt and penalty; theosis describes the positive goal of salvation. Both are needed for a complete picture.

See also: Recapitulation, Admirabile Commercium, Incarnation. Discussed in Chapters 14, 23, 24, 34.

The foundational Christian doctrine that God is one being existing eternally as three co-equal, co-eternal Persons: the Father, the Son (Jesus Christ), and the Holy Spirit. The three Persons are not three Gods but one God in three Persons, sharing the same divine nature, power, and glory. The Trinity is essential for atonement theology because it prevents distorted understandings of the cross. If the Father and the Son are two separate beings (as in various heresies), then penal substitution could appear as God punishing a third party — an innocent victim separate from Himself. But because the Father and the Son share the same divine nature and act in perfect unity, the cross is properly understood as God's self-substitution: the Triune God Himself, in the person of the Son, bears the consequences of human sin. As John Stott wrote, "The cross was not a transaction between God and somebody else; it was a transaction within God Himself." The Father does not stand over against the Son as an angry judge punishing a victim; rather, the entire Godhead acts together in self-giving love to accomplish salvation.

See also: Hypostatic Union, Incarnation, Penal Substitution. Discussed in Chapters 3, 19, 20, 24, 25, 33.

An acronym summarizing the five points of Calvinism, as articulated at the Synod of Dort (1618–1619): Total Depravity, Unconditional Election, Limited Atonement, Irresistible Grace, and Perseverance of the Saints. In the context of this book, the most relevant point is the "L" — Limited Atonement (also called "particular redemption" or "definite atonement"), which holds that Christ's death was intended specifically and exclusively for the elect. This book rejects limited atonement while respecting the broader Calvinist tradition on other points. The rejection of the "L" does not require the rejection of all five points; many theologians (sometimes called "four-point Calvinists" or "Amyraldians") affirm the other four while holding to unlimited atonement.

The doctrine that Christ's atoning death was intended for all people without exception — not merely for the elect — and that the benefits of the atonement are genuinely offered to every human being. This is the position defended in this book. Unlimited atonement does not mean that all people will be saved (that would be universalism) but that Christ's sacrifice is sufficient for all, offered to all, and intended for all. The application of the atonement depends on human faith-response. Key supporting texts include John 3:16 ("God so loved the world"), 1 John 2:2 ("not for ours only but also for the sins of the whole world"), 1 Timothy 2:4–6 (God "desires all people to be saved"), and Hebrews 2:9 (Jesus tasted death "for everyone"). The author also notes that unlimited atonement was the majority view in the early church and that its rejection (in the form of limited atonement) was a later Calvinist development.

A formulation of the atonement prominent in the Catholic theological tradition, especially in Thomistic (Thomas Aquinas–influenced) theology. Vicarious satisfaction holds that Christ offered His suffering and death to the Father as a voluntary, loving act of reparation for human sin — not as the bearing of punitive wrath, but as a supreme act of obedience and love that more than compensates for the offense of sin. Philippe de la Trinité's What Is Redemption? is a key modern articulation: Christ is the "victim of love," acting in union with the Father, offering Himself through obedience — and the preeminence of mercy, not retributive punishment, is the governing principle. This book finds deep resonance between vicarious satisfaction and its own position: both reject the "angry Father pouring wrath on the Son" caricature while affirming that Christ's death genuinely addresses the problem of sin before God. The difference lies in emphasis: the Catholic tradition tends to speak of satisfaction and merit, while this book emphasizes substitution and the bearing of sin's consequences. But the convergence is significant and underexplored.

See also: Satisfaction, Penal Substitution, Cur Deus Homo. Discussed in Chapters 16, 22, 24.

God's righteous, settled, holy opposition to sin and evil. Divine wrath is not an emotional outburst or an irrational rage; it is the consistent, just response of a perfectly holy God to everything that violates His good purposes. The reality of God's wrath is attested throughout Scripture (Rom. 1:18; Eph. 5:6; Rev. 6:16–17) and is the backdrop against which the atonement must be understood: if there is no real divine response to sin, there is nothing from which to be saved. However — and this is critical — divine wrath must never be separated from divine love. God's wrath is not the opposite of His love; it is an expression of His love. A God who did not care about injustice, cruelty, and the destruction caused by sin would not be a loving God. This book argues that at the cross, God's wrath and God's love are not in conflict but converge: the same love that sent Christ to die is the love that takes sin seriously enough to address its consequences. The Father did not pour out rage on an unwilling Son; the Triune God acted together, in love, to bear the consequences of human sin from within.

See also: Divine Justice, Propitiation, Penal Substitution, Trinity. Discussed in Chapters 3, 8, 9, 20, 26.

A Note on Terminology: Theological language can feel intimidating at first, but every one of these terms describes a real and important idea. The goal of this glossary is not to impress the reader with jargon but to equip you with the vocabulary needed to follow the arguments in this book and to engage with the broader conversation about the atonement. If you encounter a term in the body of the book that you do not understand, return to this glossary for a quick, clear explanation.