If Screwtape was written with complete sincerity, the actual task of writing it proved to be remarkably unpleasant. "Though I had never written anything more easily," Lewis recalled, "I never wrote with less enjoyment. Though it was easy to twist one's mind into the diabolical attitude, it was not fun or not for long. The strain produced a sort of spiritual cramp. The world into which I had to project myself while I spoke through Screwtape was all dust, grit, thirst, and itch. It almost smothered me before I was done.
Humphrey Carpenter, The Inklings