You couldn't say 'I had orders.' You couldn't say 'It's not fair.' No one was listening. There were no Words. You owned yourself. [...] Not 'Thou Shalt Not'. Say 'I Will Not'.

You were safe on a troll. Anyone wanting to mug a troll would have to use a building on a stick.

If you really want to upset a witch, do her a favor which she has no means of repaying. The unfulfilled obligation will nag at her like a hangnail.

You can't map a sense of humor. Anyway, what is a fantasy map but a space beyond which There Be Dragons? On the Discworld we know that There Be Dragons Everywhere. They might not all have scales and forked tongues, but they Be Here all right, grinning and jostling and trying to sell you souvenirs.

Because some stories end, but old stories go on, and you gotta dance to the music if you want to stay ahead

There are hardly any excesses of the most crazed psychopath that cannot easily be duplicated by a normal kindly family man who just comes in to work every day and has a job to do.

Everyone should occasionally break the law in some small and delightful way. It's good for the hygiene of the brain.