Colin E. Gunton on Jesus' Water Baptism as the Moment of His identification with "sin" in 2 Corinthians 5:21

  

If Jesus’s baptism is seen as his identification with Israel in her sin, then this ‘baptism’ (‘made . .  to be sin who knew no sin, so that we might become the righteousness of God’, 2 Cor. 5.21) represents the completion of the identification and its extension to all mankind. (Colin E. Gunton, Yesterday and Today: A Study of Continuities in Christology [London: Darton, Longman and Todd, 1983], 99)