The thing about witchcraft," said Mistress Weatherwax, "is that it's not like school at all. First you get the test, and then afterward you spend years findin' out how you passed it. It's a bit like life in that respect

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.

You're not allowed to call them dinosaurs any more," said Yo-less. "It's speciesist. You have to call them pre-petroleum persons.

It is true that words have power, and one of the things they are able to do is get out of someone’s mouth before the speaker has the chance to stop them.

Nigel gave the lamp a cautious buff and small smoking red letters appeared in the air. "Hi," Nigel read aloud, "Do not put down the lamp because your custom is important to us. Please leave a wish after the tone and, very shortly, it will be our command. In the meantime, have a nice eternity."

The theater troubled her. It had a magic of its own, one that didn’t belong to her, one that wasn’t in her control. It changed the world, and said things were otherwise than they were. And it was worse than that. It was magic that didn’t belong to magical people. It was commanded by ordinary people, who didn’t know the rules. They altered the world because it sounded better.

If you try to to take my bananas from me, I will reclaim them from your cold dead hands.