Martin Luther

On the Divinity and Humanity of Christ

Chapter 10

Argument: Every man is corrupted by original sin and has concupiscence. Christ had neither concupiscence nor original sin. Therefore he is not a man.

Response: I make a distinction with regard to the major premise. Every man is corrupted by original sin, with the exception of Christ. Every man who is not a divine Person [personaliter Deus], as is Christ, has concupiscence, but the man Christ has none, because he is a divine Person, and in conception the flesh and blood of Mary were entirely purged, so that nothing of sin remained. Therefore Isaiah says rightly, "There was no guile found in his mouth"; otherwise, every seed except for Mary's was corrupted.