Light thinks it travels faster than anything but it is wrong. No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it.

If you really want to upset a witch, do her a favor which she has no means of repaying. The unfulfilled obligation will nag at her like a hangnail.

The Librarian considered matters for a while. So…a dwarf and a troll. He preferred both species to humans. For one thing, neither of them were great readers. The Librarian was, of course, very much in favor of reading in general, but readers in particular got on his nerves. There was something, well, sacrilegious about the way they kept taking books off the shelves and wearing out the words by reading them. He liked people who loved and respected books, and the best way to do that, in the Librarian’s opinion, was to leave them on the shelves where Nature intended them to be.

Peace?' said Vetinari. 'Ah, yes, defined as period of time to allow for preparation for the next war.

The trouble with thinking was that, once you started, you went on doing it.

Sometimes words need music too. Sometimes the descriptions are not enough. Books should be written with soundtracks, like films.

Fantasy is uni-age. You can start it in the creche, and it follows you to death.