
“He made Him who knew no sin to be sin on our behalf, so that we might become the righteousness of God in Him.” 2 Cor. 5:21 (NASB)
Just recently I came across a very fine quote from Dr. J. I. Packer that I had copied out of his book, Knowing God, quite a long time ago. Packer sets forth–in classic Reformed style–the doctrine of propitiation in the sacrificial work of Jesus Christ. The word propitiation (Gk. hilasterion) refers to the satisfaction of the wrath of God through the death of Christ (See: Rom. 3:25; Heb. 2:17; 1 Jn. 2:2; 1 Jn. 4:10). In short, Jesus becomes sin for his people and satisfies the divine wrath of our Holy God. In addition, he gives to them his righteousness in a “double imputation.” Consider Packer’s explanation of propitiation:

“The basic description of the saving death of Christ in the Bible is as a propitiation, that is, as that which quenched God’s wrath against us by obliterating our sins from His sight. God’s wrath is His righteousness reacting against our unrighteousness; it shows retributive justice. But Jesus Christ has shielded us from the nightmare prospect of retributive justice, in obedience to His Father’s will, and receiving the wages of sin in our place. By this means justice has been done, for the sins of all that will ever be pardoned were judged and punished in the person of God the Son, and it is on this basis that pardon is now offered to us offenders. Redeeming love and retributive justice joined hands, so to speak, at Calvary, for there God showed Himself to be ‘just, and the justifier of him that hath faith in Jesus.’ Do you understand this? If you do, you are now seeing to the very heart of the Christian gospel.”
— Dr. J. I. Packer, Knowing God, 170

Packer’s quote is an excellent reminder to us of the redemptive work that Jesus Christ accomplishes for the sake of his people. The Apostle Paul puts it this way, “Christ redeemed us from the curse of the Law, having become a curse for us–for it is written, ‘Cursed is everyone who hangs on a tree.'” Therefore, let us give praise and thanks to Almighty God for sending forth his Son to do for us what we could not do for ourselves. Jesus, by his sacrificial work on the Cross, makes it possible for us to escape the retributive justice of God and live as those who have been redeemed. Soli Deo Gloria!
— Dr. Marcus J. Serven

Source: Packer, James I. Knowing God. Downers Grove, IL: InterVarsity Press, 1973.