And it is said too that a plague at its very commencement corrupts the living bodies; such also is sin. It differs in nothing from a plague, not [indeed] corrupting the air first, and then the bodies, but darting at once into the soul. Seest thou not how persons affected with the plague, are inflamed: how they writhe about, how they are full of an ill scent, how disfigured are their countenances: how wholly unclean they are? Such are they also that sin, though they see it not. For, tell me, is not he who is possessed by the desire of riches or carnal lust, worse than any one that is in a fever? Is he not more unclean than all these, when he does and submits to all shameless things?