Besides the guilt of sin and the power of sin, there is the stain of sin.

See, then, how powerful religion is it commands the heart, it commands the vitals. Morality,--that comes with a pruning-knife, and cuts off all sproutings, all wild luxuriances but religion lays the axe to the root of the tree. Morality looks that the skin of the apple be fair but religion searcheth to the very core.