"A spiritual man, who, by the practice of virtue, prayer, penance and mortification, has already laid up a certain treasure of merit in heaven, knowing full well that he has in his house, nay, even within himself, a traitor sense which, assaulting his will, and alluring it by the bait of its delectations, is able to strip it of all its spiritual wealth; with what jealousy ought he to keep guard over it; how sternly ought he to check its motions; how rigorously to keep it in subjection and restraint."