When a man is tired of Ankh-Morpork, he is tired of ankle-deep slurry.

If words had weight, a single sentence from Death would have anchored a ship.

Animals never spend time dividing experience into little bits and speculating about all the bits they've missed. The whole panoply of the universe has been neatly expressed to them as things to (a) mate with, (b) eat, (c) run away from, and (d) rocks.

Books must be treated with respect, we feel that in our bones, because words have power. Bring enough words together they can bend space and time.

The English were notoriously unenthusiastic about burning witches. I suppose ours were too soggy.

They always gives me bath salts," complained Nobby. "And bath soap and bubble bath and herbal bath lumps and tons of bath stuff and I can't think why, 'cos it's not as if I hardly ever has a bath. You'd think they'd take the hint, wouldn't you?

There are no inconsistencies in the Discworld books; ocassionally, however, there are alternate pasts.