For this reason the Lord himself gave as the sign of our salvation, the one who was born of the Virgin, Emmanuel. It was the Lord himself who saved them, for of themselves they had no power to be saved. For this reason Paul speaks of the weakness of man, and says: I know that no good dwells in my flesh, meaning that the blessing of our salvation comes not from us but from God. Again, he says: I am a wretched man; who will free me from this body doomed to die? Then he speaks of a liberator, thanks to Jesus Christ our Lord.