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

Them as can do has to do for them as can't. And someone has to speak up for them as has no voices.

Science fiction is fantasy with bolts painted on outside.

Do you think it's possible for an entire nation to be insane?

I once absent-mindedly ordered Three Mile Island dressing in a restaurant and, with great presence of mind, they brought Thousand Island Dressing and a bottle of chili sauce.

Look, he said to his imagination, if this is how you're going to behave, I shan't bring you again.

No one's policing their own minds more than an author. You spend a lot of time in your own head analysing what you think about things, and a philosophy comes.