J. Gresham Machen on the Atonement (excerpts)

The one place where the word [atonement] occurs in the King James Version of the New Testament is Romans 5:11 … Here the word is used to translate a Greek word meaning ‘reconciliation.’ This usage seems to be very close to the etymological meaning of the word, for it does seem to be true that the English word ‘atonement’ means ‘atonement.’ It is, therefore, according to its derivation, a natural word to designate the state of reconciliation between two parties formerly at variance.

In the Old Testament, on the other hand, where the word occurs in the King James Version not once, but forty or fifty times, it has a different meaning; it has the meaning of ‘propitiation.’ [See Leviticus 1:4, 16:6, 16:15f.]

... In these passages the meaning of the word is clear. God has been offended because of the sins of the people or of individuals among His people. The priest kills the animal which is brought as a sacrifice. God is thereby propitiated, and those who have offended God are forgiven.

… All that I am saying is that that word in the Old Testament clearly conveys the notion of something that is done to satisfy God in order that the sins of men may be forgiven and their communion with God restored. … In our ordinary usage the word certainly conveys the idea of something like compensation for some wrong that has been done. … God is offended because of sin; satisfaction is made to Him in some way by the sacrifice; and so His favour is restored. … We mean by the word [atonement], when we thus use it in theology, not the reconciliation between God and man, not the ‘at-onement’ between God and man, but specifically the means by which that reconciliation is effected — namely, the death of Christ as something that was necessary in order that sinful man might be received into communion with God.

… However, there is another word which would in itself have been much better, and it is really a great pity that it has not come into more general use in this connection. That is the word ‘satisfaction.’ If we only had acquired the habit of saying that Christ made full satisfaction to God for man that would have conveyed a more adequate account of Christ’s priestly work as our Redeemer than the word ‘atonement’ can convey. It designates what the word ‘atonement’ — rightly understood — designates, and it also designates something more.

… You cannot possibly understand what the Bible says about salvation unless you understand what the Bible says about the thing from which we are saved.

If then we ask what is the Biblical doctrine of sin, we observe, in the first place, that according to the Bible all men are sinners. … Sin, [the Bible] tells us, is disobedience to the law of God, and the law of God is entirely irrevocable. … When the law of God says, ‘The soul that sinneth it shall die,’ that awful penalty of death is, indeed, imposed by God’s will; but God’s will is determined by God’s nature, and God’s nature being unchangeably holy the penalty must run its course. God would be untrue to Himself, in other words, if sin were not punished; and that God should be untrue to Himself is the most impossible thing that can possibly be conceived.

… How then can sinful men be saved? In one way only. Only if a substitute is provided who shall pay for them the just penalty of God’s law.

The Bible teaches that such a substitute has as a matter of fact been provided. The substitute is Jesus Christ. The law’s demands of penalty must be satisfied. There is no escaping that. But Jesus Christ satisfied those demands for us when He died instead of us on the cross.

… The law demanded that we should suffer eternal death because of our sin. Christ paid the penalty of the law in our stead. But for Him to suffer was not the same as for us to suffer. He is God, and not merely man. Therefore if He had suffered to all eternity as we should have suffered, that would not have been to pay the just penalty of the sin, but it would have been an unjust exaction of vastly more. In other words, we must get rid of merely quantitative notions in thinking of the sufferings of Christ. What He suffered on the cross was what the law of God truly demanded not of any person but of such a person as Himself when He became our substitute in paying the penalty of sin. He did therefore make full and not merely partial satisfaction for the claims of the law against us.

… No, God Himself paid the penalty of sin — God Himself in the Person of God the Son, who loved us and gave Himself for us, God Himself in the person of God the Father who so loved the world as to give His only-begotten Son, God the Holy Spirit who applies to us the benefits of Christ’s death. God’s the cost and ours the marvellous gain! Who shall measure the depths of the love of God which was extended to us sinners when the Lord Jesus took our place and died in our stead upon the accursed tree? (Excerpts from: J. Gresham Machen, The Doctrine of the Atonement)