Penal substitution, also called penal substitutionary atonement and especially in older writings forensic theory,Vincent Taylor, The Cross of Christ (London: Macmillan & Co, 1956), pp. 71–72: '...the four main types, which have persisted throughout the centuries. The oldest theory is the Ransom Theory...It held sway for a thousand years. ... The Forensic Theory is that of the Reformers and their successors.' is a theory of the atonement within Protestant Christian theology, which declares that Christ, voluntarily submitting to God the Father's plan, was punished (penalized) in the place of sinners (substitution), thus satisfying the demands of justice and propitiation, so God can justly forgive sins making us at one with God (atonement). It began with the German Reformation leader Martin Luther and continued to develop within the Calvinist traditionJ. I. Packer, What did the Cross Achieve? The Logic of Penal Substitution (Tyndale Biblical Theology Lecture, 1973): '... Luther, Calvin, Zwingli, Melanchthon and their reforming contemporaries were the pioneers in stating it [i.e. the penal substitutionary theory]...'H. N. Oxenham, The Catholic doctrine of the atonement (London: Longman, Green, Longman, Roberts, and Green, 1865), pp. 112–113,119: '...we may pause to sum up briefly the main points of teaching on Christ's work of redemption to be gathered from the patristic literature of the first three centuries as a whole. And first, as to what it does not contain. There is no trace, as we have seen, of the notions of vicarious satisfaction, in the sense of our sins being imputed to Christ and His obedience imputed to us, which some of the Reformers made the very essence of Christianity; or, again, of the kindred notion that God was angry with His Son for our sakes, and inflicted on Him the punishment due to us; nor is Isaiah s prophecy interpreted in this sense, as afterwards by Luther; on the contrary, there is much which expressly negatives this line of thought. There is no mention of the justice of God, in the forensic sense of the word; the Incarnation is in variably exclusively ascribed to His love; the term satisfaction does not occur in this connection at all, and where Christ is said to suffer for us, huper (not anti) is the word always used. It is not the payment of a debt, as in St. Anselm's Cur Deus Homo, but the restoration of our fallen nature, that is prominent in the minds of these writers, as the main object of the Incarnation. They always speak, with Scripture, of our being reconciled to God, not of God being reconciled to us.' [pp. 112–113]; 'His [Jesus'] death was now [in the Reformation period], moreover, for the first time viewed as a vicarious punishment, inflicted by God on Him instead of on us.' [p. 119] as a specific understanding of substitutionary atonement. The penal model teaches that the substitutionary nature of Jesus' death is understood in the sense of a substitutionary fulfilment of legal demands for the offenses of sins.

Definition

The penal substitution theory teaches that Jesus suffered the penalty due, according to God the Father's wrath for humanity's sins. The St Andrews Encyclopedia of Theology states the definition as, “Jesus satisfies the righteousness of God by suffering the penalty for sin in our place, that we might participate in his righteousness”, while recognising that there is a wide range of views within that definition.

Penal substitution derives from the idea that divine forgiveness must satisfy divine justice, that is, that God is not willing or able to simply forgive sin without first requiring a satisfaction for it. It states that God gave himself in the person of his Son, Jesus, to suffer the death, punishment and curse due to fallen humanity as the penalty for human sin.

Important theological concepts about penal substitution depend on the doctrine of the Trinity. Those who believe that Jesus was himself God, in line with the doctrine of the Trinity, believe that God took the punishment upon himself rather than putting it on someone else. In other words, the doctrine of union with Christ affirms that, by taking the punishment upon himself, Jesus fulfils the demands of justice not for an unrelated third party but for those identified with him. If, in the penal substitution understanding of the atonement, the death of Christ deals with sin and injustice, his resurrection is the renewal and restoration of righteousness.

Development The penal substitution theory is a specific interpretation of vicarious (substitutionary) atonement, which in turn goes back to Second Temple Judaism, although some evangelicals such as William Lane Craig cite Moses' offer of death for himself instead of for the people of Israel (Exodus 32:30-34) as an example of this substitution. It was developed during the Protestant Reformation of the 16th century,Gregg Allison, 'A History of the Doctrine of the Atonement' in Southern Baptist Journal of Theology 11.2 (Summer 2007): 4-19: 'The Reformers introduced another view of the atonement, generally called the penal substitutionary theory ' (p. 10); '...the penal substitutionary theory of the atonement, originated by the Reformers and developed by their successors' (p. 14-15).Gustaf Aulen, Christus Victor (1931) (London: SPCK), p. 143: 'The history of the doctrine of the Atonement is a history of three types of view, which emerge in turn. The classic idea emerges with Christianity itself, and remains the dominant type for of teaching for a thousand years. The origin of the Latin doctrine can be exactly determined...' being advocated by Martin Luther and John Calvin.'The roots of the penal substitution view are discernible in the writings of John Calvin (1509-1564), though it was left to later expositors to systematize and emphasize it in its more robust forms.' (Paul R. Eddy and James Beilby, 'The Atonement: An Introduction', in P. R. Eddy and J. Beilby [eds], The Nature of the Atonement: Four Views [Downers Grove: IVP, 2006], p. 17) It was more concretely formulated by the Reformed theologian Charles Hodge (1797–1878). Advocates of penal substitution argue that the concept is both biblically-based'But he was pierced for our transgressions; he was crushed for our iniquities; upon him was the chastisement that brought us peace, and with his wounds we are healed.' Isaiah 53:5 ESV and rooted in the historical traditions of the Christian Church.

Vicarious atonement

The idea of vicarious atonement flows from Judaism. Isaiah 53:4–6, 10, 11 refers to the "suffering servant":

New Testament The New Testament authors used various metaphors to explain and interpret the death and resurrection of Jesus. According to C. Marvin Pate, "there are three aspects to Christ's atonement according to the early Church: vicarious atonement [substitutionary atonement], the eschatological defeat of Satan [Christ the Victor], and the imitation of Christ [participation in Jesus' death and resurrection]." Pate further notes that these three aspects were intertwined in the earliest Christian writings, but that this intertwining was lost since the Patristic times.

Key New Testament references which can be interpreted to reflect a vicarious atonement of Jesus' death and resurrection include: Romans 3:23–26—"All have sinned and fall short of the glory of God; they are now justified by his grace as a gift, through the redemption that is in Christ Jesus, whom God put forward as a sacrifice of atonement by his blood, effective through faith. He did this to show his righteousness, because in his divine forbearance he had passed over the sins previously committed; it was to prove at the present time that he himself is righteous and that he justifies the one who has faith in Jesus." (NRSV) 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." (RSV) Galatians 3:10, 13—"All who rely on works of the law are under a curse; for it is written, 'Cursed be every one who does not abide by all things written in the book of the law, and do them.' ... Christ redeemed us from the curse of the law, having become a curse for us – for it is written, 'Cursed be every one who hangs on a tree. (RSV) Colossians 2:13–15—"And you, who were dead in trespasses and uncircumcision of your flesh having cancelled the bond which stood against us with its legal demands; this he set aside, nailing it to the cross. He disarmed the principalities and powers and made a public example of them, triumphing over them in him." (RSV) 1 Peter 2:24—"He himself bore our sins in his body on the tree, that we might die to sin and live to righteousness." (RSV) 1 Peter 3:18—"For Christ also died for sins once for all, the righteous for the unrighteous, that he might bring us to God." (RSV)

On the basis of , N. T. Wright has argued that there are, in fact, different models of penal substitution in which ideas of justification work together with redemption and sacrifice.N. T. Wright, Fulcrum (Eastertide 2007)

Early Church The ransom theory of atonement was the nearly predominant view accepted in the period of the Early Church Fathers.Michael Green, The Empty Cross of Jesus (Eastbourne: Kingsway, 2004; first published 1984), p. 64-5: 'The simplest and most obvious understanding of the cross is to see it as the supreme example. ... This is a favourite theme in the early Fathers, as H.E.W. Turner showed in The Patristic Doctrine of Redemption. ... It can scarcely be denied that much of the second century understanding of the cross was frankly exemplarist.' As ransom theory of atonement began to fade from view in the Middle Ages, other theories such as the satisfaction theory began to develop.J. F. Bethune-Baker, An introduction to the early history of Christian doctrine to the time of the Council of Chalcedon (London: Methuen & Co, 1903), pp. 328, 351–352: 'Of the various aspects of the Atonement which are represented in the pages of the New Testament, the early Fathers chiefly dwell on those of sacrifice (and obedience), reconciliation, illumination by knowledge, and ransom. Not till a later time was the idea of satisfaction followed up' [p. 328]; 'The only satisfaction which was thought of was the satisfaction which the penitent himself makes. There is no suggestion of any satisfaction of the divine justice through the sufferings of Christ. ' [p. 328, n. 3]; 'From this review of the teaching of the Church it will be seen that there is only the most slender support to be found in the earliest centuries for some of the views that became current at a later time. It is at least clear that the sufferings of Christ were not regarded as an exchange or substitution of penalty, or as punishment inflicted on him by the Father for our sins. There is, that is to say, no idea of vicarious satisfaction, either in the sense that our sins are imputed to Christ and his obedience to us, or in the sense that God was angry with him for our sakes and inflicted on him punishment due to us.' [pp. 351–352]. It has been generally recognized that only hints of penal substitutionary atonement can be found in the writing of the Early Church, with the most explicit articulations arriving during the time of the Reformation.

Scholars vary when interpreting proposed precursors to penal substitution in the writings of some of the Early Church Fathers, including Justin Martyr (), Eusebius of Caesarea ( – 339), Athanasius of Alexandria ( – 373) and Augustine of Hippo (354–430). There is general agreement that no writer in the Early Church taught penal substitution as their primary theory of atonement. Yet some writers appear to reference some of the ideas of penal substitution as an afterthought or as an aside.