Hat = wizard, wizard = hat. Everything else is frippery.

Dwarfs were not a naturally religious species, but in a world where pit props could crack without warning and pockets of fire damp could suddenly explode they'd seen the need for gods as the sort of supernatural equivalent of a hard hat. Besides, when you hit your thumb with an eight-pound hammer it's nice to be able to blaspheme. It takes a very special and strong-minded kind of atheist to jump up and down with their hand clasped under their other armpit and shout, "Oh, random-fluctuations-in-the-space-time-continuum!" or "Aaargh, primitive-and-outmoded-concept on a crutch!

Their families cordially detested one another.

Witches aren’t like that. We live in harmony with the great cycles of Nature, and do no harm to anyone, and it’s wicked of them to say we don’t. We ought to fill their bones with hot lead.

The sign, which says: "Do not, under any circumstances, open this door!" - Of course, I've read it. Why do you think I want it opened?.. To see why they wanted it shut, of course. This exchange contains almost all you need to know about human civilization. At least, those bits of it that are now under the sea, fenced off or still smoking.

There's a saying that all roads lead to Ankh-Morpork. And it's wrong. All roads lead away from Ankh-Morpork, but sometimes people just walk along them the wrong way.

Gods prefer simple, vicious games, where you Do Not Achieve Transcendence but Go Straight To Oblivion; a key to the understanding of all religion is that a god's idea of amusement is Snakes and Ladders with greased rungs.