What's the orbital velocity of the moon?

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.

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.

Many people, meeting Aziraphale for the first time, formed three impressions: that he was English, that he was intelligent, and that he was gayer than a treeful of monkeys on nitrous oxide.

Open your eyes and then open your eyes again.

Gravity is a habit that is hard to shake off.

Or -- and this she knew was a far more accurate way of looking at it -- the book was true and reality was lying.