If anyone wants one my advise is to go where the orthodox Jews shop, because when it comes to a big black fedora, the guys with ringlets and long black coats definitely know a stylish hat when they see one. You want to get it home and use a hot steaming kettle, and bob's your uncle - you have a hat with all the right curves!

She was, in fact, quite a pleasant looking girl, even if her bosom had clearly been intended for a girl two feet taller; but she was not Her. The Egregious Professor of Grammar and Usage would have corrected this to "she was not she," which would have caused the Professor of Logic to spit out his drink.

Geography is just physics slowed down, with a couple of trees stuck in it.

Racism was not a problem on the Discworld, because - what with trolls and dwarfs and so on - speciesism was more interesting. Black and white lived in perfect harmony and ganged up on green.

It was then that Marvin got religion. Not the quiet, personal kind, that involves doing good deeds and living a better life; not even the kind that involves putting on a suit and ringing people's doorbells; but the kind that involves having your own TV network and getting people to send you money.

Reality is not digital, an on-off state, but analog. Something gradual. In other words, reality is a quality that things possess in the same way that they possess, say, weight. Some people are more real than others, for example. It has been estimated that there are only about five hundred real people on any given planet, which is why they keep unexpectedly running into one another all the time.

It doesn't stop being magic just because you know how it works.