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
And so the passage “The Word was made flesh” seems to me to be equivalent to that in which it is said that he was made sin or a curse for us; not that the Lord was transformed into either of these—how could he be? But because by taking them upon him he took away our sins and bore our iniquities.