They said therefore to him, "What then do you do for a sign, that we may see, and believe you? What work do you do?
III. Unbelief is a denial of man's highest hopes.  The unbeliever forsakes the hope of heaven, forfeits all cosmic value for himself, and flaunts his conviction that he shall descend to the rottenness of a grave and remain there forever.  Such a spiritual renunciation is soul suicide; and even Christ marveled at such a thing.