"What're quantum mechanics?" — Terry Pratchett

"This is really horrible," said Eric, as they walked away. "It gives evil a bad name." (p. 171)

The kings of Hell might have heard of words like "subtlety" and "discretion," but they had also heard that if you had it you should flaunt it and reasoned that, if you didn't have it, you should flaunt it even more, and what they didn't have was good taste. (pp. 186-187)

The speaker was Duke Vassenego, one of the oldest demons. How old, no one knew. But if he didn't actually invent original sin, at least he made one of the first copies. In terms of sheer enterprise and deviousness of mind he might even have passed for human and, in fact, generally took the form of an old, rather sad lawyer with an eagle somewhere in his ancestry. (pp. 173-174)