Terry Pratchett, Eric

"The consensus seemed to be that if really large numbers of men were sent to storm the mountain, then enough might survive the rocks to take the citadel. This is essentially the basis of all military thinking."

"the whole point of the wish business was to see to it that what the client got was exactly what he asked for and exactly what he didn't really want."

"The fact was that, as droves of demon kings had noticed, there was a limit to what you could do to a soul with, e.g., red-hot tweezers, because even fairly evil and corrupt souls were bright enough to realize that since they didn't have the concomitant body and nerve endings attached to them there was no real reason, other than force of habit, why they should suffer excruciating agony. So they didn't. Demons went on doing it anyway, because numb and mindless stupidity is part of what being a demon is all about, but since no one was suffering they didn't enjoy it much either and the whole thing was pointless. Centuries and centuries of pointlessness."

"His voice gave out and he made several wavy motions with his hand, indicative of the shape of a woman who would probably be unable to keep her balance."

"No enemies had ever taken Ankh-Morpork. Well technically they had, quite often; the city welcomed free-spending barbarian invaders, but somehow the puzzled raiders found, after a few days, that they didn't own their horses any more, and within a couple of months they were just another minority group with its own graffiti and food shops."

"The Tezuman Empire in the jungle valleys of central Klatch is known for it organic market gardens, its exquisite craftsmanship in obsidian, feathers and jade, and its mass human sacrifices in honor of Quezovercoatl, the Feathered Boa, god of mass human sacrifices."