It is [Jesus'] love alone that lets him become guilty. Out of his selfless love, out of his sinless nature, Jesus enters into the guilt of human beings; he takes it upon himself. A sinless nature and guilt bearing are bound together in him indissolubly. As the sinless one Jesus takes guilt upon himself, and under the burden of this guilt, he shows that he is the sinless one.

-- Dietrich Bonhoeffer, God Is In The Manger