For he has made him, who knew no sin, to be sin for us; that we might be made the righteousness of God in him.
All Commentaries on 2 Corinthians 5:21 Go To 2 Corinthians 5
Gregory the Theologian
AD 390
But look at it in this manner: that as for my sake he was called a curse who destroyed my curse, and sin who takes away the sin of the world, and became a new Adam to take the place of the old, just so he makes my disobedience his own as head of the whole body. As long, then, as I am disobedient and rebellious, both by denial of God and by my passions, so long Christ is also called disobedient on my account. But when all things shall be subdued to him on the one hand by acknowledgment of him and on the other by a reformation, then he himself also will have fulfilled his submission, bringing me whom he has saved to God.