“You did something because it had always been done, and the explanation was, ‘But we’ve always done it this way.’ A million dead people can’t have been wrong, can they?”

“This time it had been magic. And it didn't stop being magic just because you found out how it was done.”

“Anyway, Angua seemed to have taken this case personally. She always had a soft spot for the underdog.So did Vimes. You had to. Not because they were pure or noble, because they weren't. You had to be on the side of underdogs because they weren't overdogs.”

“I believe you find life such a problem because you think there are good people and bad people. You're wrong, of course. There are, always and only, the bad people, but some of them are on opposite sides.”

“There were a lot of things he could say. "Son of a bitch!" would have been a good one. Or he could say, "Welcome to civilization!" He could have said, "Laugh this one off!" He might have said, "Fetch!" But he didn’t, because if he had said any of those things then he’d have known that what he had just done was murder.”

“He had never been interested in stories at any age, and had never quite understood the basic concept. He'd never read a work of fiction all the way through. He did remember, as a small boy, being really annoyed at the depiction of Hickory Dickory Dock in a rag book of nursery rhymes because the clock in the drawing was completely wrong for the period.”

“Crowley had always known that he would be around when the world ended, because he was immortal and wouldn’t have any alternative. But he hoped it was a long way off. Because he rather liked people. It was major failing in a demon. Oh, he did his best to make their short lives miserable, because that was his job, but nothing he could think up was half as bad as the stuff they thought up themselves. They seemed to have a talent for it. It was built into the design, somehow. They were born into a world that was against them in a thousand little ways, and then devoted most of their energies to making it worse. Over the years Crowley had found it increasingly difficult to find anything demonic to do which showed up against the natural background of generalized nastiness. There had been times, over the past millennium, when he’d felt like sending a message back Below saying, Look we may as well give up right now, we might as well shut down Dis and Pandemonium and everywhere and move up here, there’s nothing we can do to them that they don’t do to themselves and they do things we’ve never even thought of, often involving electrodes. They’ve got what we lack. They’ve got imagination. And electricity, of course. One of them had written it, hadn’t he…”Hell is empty, and all the devils are here.”