Granny sighed. "You have learned something," she said, and thought it safe to insert a touch of sternness into her voice. "They say a little knowledge is a dangerous thing, but it is not one half so bad as a lot of ignorance.

The stories never said why she was wicked. It was enough to be an old woman, enough to be all alone, enough to look strange because you have no teeth. It was enough to be called a witch. If it came to that, the book never gave you the evidence of anything. It talked about "a handsome prince"... was he really, or was it just because he was a prince that people called handsome? As for "a girl who was as beautiful as the day was long"... well, which day? In midwinter it hardly ever got light! The stories don't want you to think, they just wanted you to believe what you were told.

Everything is a test.

Colon has always thought that heroes had some special kind of clockwork that made them go out and die famously for god, country and apple pie, or whatever particular delicacy their mother made. It had never occurred to him that they might do it because they'd get yelled at if they didn't.

I try to make computers say things like You have 60 seconds to achieve safe distance.

No! Please! I'll tell you whatever you want to know!" the man yelled. "Really?" said Vimes. "What's the orbital velocity of the moon?" "What?" "Oh, you'd like something simpler?

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.