He that is penitent ought never to forget his sin, but on the one hand, to beseech God not to remember it; while on the other, he himself never forgets it. If we remember it, God will forget it. Let us exact punishment from ourselves; let us accuse ourselves; thus shall we propitiate the Judge. For sin confessed becomes less, but not confessed worse. For if sin add to itself shamelessness and ingratitude, how will he who does not know that he sinned before be at all able to guard himself from falling again into the same [evils]?