Screwtape examines the virtue of Humility:
Your patient has become humble; have you drawn his attention to the fact? All virtues are less formidable to us once the man is aware that he has them, but this is specially true of humility. Catch him at the moment when he is really poor in spirit and smuggle into his mind the gratifying reflection, ‘By jove! I’m being humble’, and almost immediately pride–pride at his own humility–will appear. If he awakes to the danger and tries to smother this new form of pride, make him proud of his attempt–and so on, through as many stages as you please. But don’t try this too long, for fear you awake his sense of humour and proportion, in which case he will merely laugh at you and go to bed.
But there are other profitable ways of fixing his attention on the virtue of Humility. By this virtue, as by all the others, our Enemy wants to turn the man’s attention away from self to Him, and to the man’s neighbours. All the abjection and self-hatred are designed, in the long run, solely for this end; unless they attain this end they do us little harm; and they may even do us good if they keep the man concerned with himself, and, above all, if self-contempt can be made the starting-point for contempt of other selves, and thus for gloom, cynicism, and cruelty.
–from The Screwtape Letters