Graham Greene Quote

Despair is the price one pays for setting oneself an impossible aim. It is, one is told, the unforgivable sin, but it is a sin the corrupt or evil man never practices. He always has hope. He never reaches the freezing-point of knowing absolute failure. Only the man of goodwill carries always in his heart this capacity for damnation.

Heart of the Matter (1948) bk. 1, pt. 1, ch. 2