Through his Spirit, [Christ] gave men the power to become sons of God, so that all those he has chosen might be taught by the firstborn among many brothers to say: Our Father, who are in heaven. Again he says elsewhere: I ascend to my Father and to your Father. By the Spirit, from the womb of the Virgin, was born our head, the Son of Man; and by the same Spirit, in the waters of baptism, we are reborn as his body and as sons of God. And just as he was born without any sin, so we are reborn in the forgiveness of all our sins. As on the cross he bore the sum total of the whole body’s sins in his own physical body, so he gave his members the grace of rebirth in order that no sin might be imputed to his mystical body. It is written: Blessed is the man to whom the Lord imputes no sin. The blessed man of this text is undoubtedly Christ, who forgives sins insofar as God is his head. Insofar as this man is the head of the body, no sin is forgiven him. But insofar as the body that belongs to this head consists of many members, sin is not imputed to it. Just in himself, it is he who justifies himself. He alone is both Savior and saved.