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. By his wounds you have been healed.
Who his own self bare our sins This form of speaking is fitted to set forth the efficacy of Christ’s death. For as under the Law, the sinner, that he might be released from guilt, substituted a victim in his own place; so Christ took on himself the curse due to our sins, that he might atone for them before God. And he expressly adds, on the tree, because he could not offer such an expiation except on the cross. Peter, therefore, well expresses the truth, that Christ’s death was a sacrifice for the expiation of our sins; for being fixed to the cross and offering himself a victim for us, he took on himself our sin and our punishment. Isaiah, from whom Peter has taken the substance of his doctrine, employs various forms of expression, — that he was smitten by God’s hand for our sins, that he was wounded for our iniquities, that he was afflicted and broken for our sake, that the chastisement of our peace was laid on him. But Peter intended to set forth the same thing by the words of this verse, even that we are reconciled to God on this condition, because Christ made himself before his tribunal a surety and as one guilty for us, that he might suffer the punishment due to us.~John Calvin Commentary
Lest, however, we should think that the patience of our Lord was intended to be our example and nothing more, the apostle goes on to speak expressly of the expiatory nature of the sufferings alluded to. He has held up the Savior in all His woes as our example, but knowing the evil tendency of skeptical minds, by any means, to becloud the cross, he now puts aside the example, for a moment, and speaks of the Redeemer as the great sacrifice for sin. The sacred writers are always very clear and distinct upon this truth and so must we be. There is no preaching the gospel if the atonement is left out. No matter how well we speak of Jesus as a pattern, we have done nothing unless we point Him out as the substitute and sin-bearer. We must, in fact, continually imitate the apostle, and speak plainly of Him, “Who His own self bore our sins in His own body on the tree.”~Charles Spurgeon