Wherefore I entreat you to do all things so as to fence off their entrance; and not by comforting yourselves with this heartless reasoning to bring in upon yourselves all wickedness, saying, what of this? What of that? For countless ills have their birth from hence. For the devil, being depraved, makes use of much craft, and exertion, and self-abasement for the ruin of men, and begins his attack on them with things of a more trifling nature.