Let No Man Flatter Himself

"Let no man flatter himself: of himself he is a devil: his happiness he owes entirely to God. What have you of your own but sin? Take your sin which is your own; for righteousness is of God ... Why presume so much on the capability of nature? It is wounded, maimed, vexed, lost. The thing wanted is genuine confession, not false defense...When any one knows that he is nothing in himself, and has no help from himself, the weapons within himself are broken, and the war is ended. - Augustine, De Natura et Gratia