“There was a wicked ole witch once called Black Aliss. She was an unholy terror. There's never been one worse or more powerful. Until now. Because I could spit in her eye and steal her teeth, see. Because she didn't know Right from Wrong, so she got all twisted up, and that was the end of her."The trouble is, you see, that if you do know Right from Wrong, you can't choose Wrong. You just can't do it and live. So.. if I was a bad witch I could make Mister Salzella's muscles turn against his bones and break them where he stood... if I was bad. I could do things inside his head, change the shape he thinks he is, and he'd be down on what had been his knees and begging to be turned into a frog... if I was bad. I could leave him with a mind like a scrambled egg, listening to colors and hearing smells...if I was bad. Oh yes." There was another sigh, deeper and more heartfelt."But I can't do none of that stuff. That wouldn't be Right."She gave a deprecating little chuckle. And if Nanny Ogg had been listening, she would have resolved as follows: that no maddened cackle from Black Aliss of infamous memory, no evil little giggle from some crazed Vampyre whose morals were worse than his spelling, no side-splitting guffaw from the most inventive torturer, was quite so unnerving as a happy little chuckle from a Granny Weatherwax about to do what's best.”

“Mind you,” said Ponder, “the universe does have a rhythm. Day and night, light and dark, life and death—” “Chicken soup and croutons,” said Ridcully. "Well, not evert metaphor bears close examination".”

“Cats do not hunt seals. They would hunt them if they knew what seals and where to find them. But they do not know, so it's okay.”

“Humans need fantasy to be human.”

“NEITHER RAIN NOR SNOW NOR GLOM OF NIT CAN STAY THESE MESENGERS ABOT THEIR DUTY”

“It's rude to stare," said the troll. Its mouth opened with a little crest of foam, and shut again in exactly the same way that water closes over a stone. "Is it? Why?" asked Rincewind. How does he hold himself together, his mind screamed at him. Why doesn't he spill?”

“I HAVE MADE THIS FOR YOU. She reached out and took a damp square of cardboard. Water dripped off the bottom. Somewhere in the middle, a few brown feathers seemed to have been glued on. 'Thank you. Er ... what is it?'ALBERT SAID THERE OUGHT TO BE SNOW ON IT, BUT IT APPEARS TO HAVE MELTED, said Death. IT IS, OF COURSE, A HOGSWATCH CARD.'Oh ...' THERE SHOULD HAVE BEEN A ROBIN ON IT AS WELL, BUT I HAD CONSIDERABLE DIFFICULTY IN GETTING IT TO STAY ON. 'Ah...'IT WAS NOT AT ALL COOPERATIVE.'Really ...?'IT DID NOT SEEM TO GET INTO THE HOGSWATCH SPIRIT AT ALL.”

“Why are our people going out there,” said Mr. Boggis of the Thieves’ Guild."Because they are showing a brisk pioneering spirit and seeking wealth and … additional wealth in a new land,” said Lord Vetinari.“What’s in it for the Klatchians?” said Lord Downey.“Oh, they’ve gone out there because they are a bunch of unprincipled opportunists always ready to grab something for northern,” said Lord Vetinari.“A mastery summation, if I may say so, my lord,” said Mr. Burleigh. The Patrician looked down again at his notes. “Oh, I do beg your pardon, I seem to have read those last to sentences in the wrong order…”

“Susan hated Literature. She'd much prefer to read a good book.”

“The trouble is you can shut your eyes but you can’t shut your mind.”

“Then Tak looked upon the stone and it was trying to come alive, and Tak smiled, and wrote All things strive.And for the service the stone had given, he fashioned it into the first Troll, and delighted in the life that came unbidden.”