Things just happen. What the hell.

Carpe Jugulum," read Agnes aloud. "That's... well, Carpe Diem is 'Sieze the Day,' so this means-" "Go for the throat

Oh, where are my manners? Do sit down. Pull up a small child.

Unseen University was much bigger on the inside. Thousands of years as the leading establishment of practical magic in a world where dimensions were largely a matter of chance in any case had left it bulging in places where it shouldn't have places. There were rooms containing rooms which, if you entered them, turned out to contain the room you'd started with, which can be a problem if you are in a conga line.

Ordinary fortune-tellers tell you what you want to happen; witches tell you what’s going to happen whether you want it to or not. Strangely enough, witches tend to be more accurate but less popular.

There's a lot of science in it, and as Slartibartfast [in The Hitchhiker's Guide to the Galaxy] said: 'I am a great fan of science, but I cannot do a quadratic equation.' I've never, ever been able to do one. I remember one occasion at Warwick University, when Jack and Ian were at their wits' end because I couldn't get it. I felt totally ashamed.

Never trust any complicated cocktail that remains perfectly clear until the last ingredient goes in, and then immediately clouds.