Man is not an angel, nor is he a devil. He is not intrinsically corrupt (as theologians began claiming four hundred years ago) nor is he intrinsically divine (as philosophers began saying fifty years ago). Rather, man has aspirations to good which he finds it impossible to realize completely by himself; at the same time, he has an inclination toward evil which solicits him away from these ideals. He is like a man who is down a well through his own stupidity. He knows he ought not to be there, but he cannot get out by himself. Or to change the picture, he is like a clock whose mainspring is broken. He needs to be fixed on the inside, but the repairs must be supplied from without. He is mistaken if he is an optimist, who believes evolution will give him a mainspring, or a pessimist, who believes that nobody can fix him. He is a creature who can run well again, but only if some watchmaker will have the kindness to repair him.
--Archbishop Fulton J. Sheen, Peace of Soul, 1949