[Englishmen] take their “sense of humour” so seriously that a deficiency in this sense is almost the only deficiency at which they feel shame. Humour is for them the all-consoling and (mark this) the all-excusing, grace of life. Hence it is invaluable as a means of destroying shame. [. . .] A thousand bawdy, or even blasphemous, jokes do not help towards a man’s damnation so much as his discovery that almost anything he wants to do can be done, not only without the disapproval but with the admiration of his fellows, if only it can get itself treated as a Joke. And this temptation can be almost entirely hidden from your patient by that English seriousness about Humour. Any suggestion that there might be too much of it can be represented to him as “Puritanical” or as betraying a “lack of humour.”

- The Screwtape Letters