Seeing things a human shouldn't have to see makes us human.

Gravity is a habit that is hard to shake off.

Inside every sane person there's a madman struggling to get out," said the shopkeeper. "That's what I've always thought. No one goes mad quicker than a totally sane person.

The universe, they said, depended for its operation on the balance of four forces which they identified as charm, persuasion, uncertainty and bloody-mindedness.

Young man, the games we play are lessons we learn. The assumptions we make, things we ignore, and things we change make us what we become.

'Discworld' is taking something that you know is ridiculous and treating it as if it is serious, to see if something interesting happens when you do so.

Incidentally, it's best not to argue with the nursing staff. I find the best course of action is to throw some chocolates in one direction and hurry off in the other while their attention is distracted.