All assassins had a full-length mirror in their rooms, because it would be a terrible insult to anyone to kill them when you were badly dressed.

You have the effrontery to be squeamish, it thought at him. But we were dragons. We were supposed to be cruel, cunning, heartless and terrible. But this much I can tell you, you ape – the great face pressed even closer, so that Wonse was staring into the pitiless depths of his eyes – we never burned and tortured and ripped one another apart and called it morality.

My name is immaterial,' she said. That's a pretty name,' said Rincewind.

It was amazing how many friends you could make by being bad at things, provided you were bad enough to be funny.

Do you think there’s anything to eat in this forest?” “Yes,” said the wizard bitterly, “us.

However, you do need rules. Driving on the left (or the right or, in parts of Europe, on the left and the right as the mood takes you) is a rule which works, since following it means you're more likely to reach your intended rather than your final destination.

Belief is one of the most powerful organic forces in the multiverse. It may not be able to move mountains, exactly. But it can create someone who can. People get exactly the wrong idea about belief. They think it works back to front. They think the sequence is, first object, then belief. In fact, it works the other way.