“Of all the forces in the universe, the hardest to overcome is the force of habit.”

“Either your clothes died when you did, he thought, or maybe you just mentally dressed yourself from force of habit.”

“Thou shalt not submit thy god to market forces.”

“It was all very well going on about pure logic and how the universe was ruled by logic and the harmony of numbers, but the plain fact of the matter was that the Disc was manifestly traversing space on the back of a giant turtle and the gods had a habit of going round to atheists' houses and smashing their windows.”

“But that was just it - hate was exactly the right word. Hate is a force of attraction. Hate is just love with its back turned.”

“Rincewind tried to force the memory out of his mind, but it was rather enjoying itself there, terrorizing the other occupants and kicking over the furniture.”

“What is magic?Then there is the witches' explanation, which comes in two forms, depending on the age of the witch. Older witches hardly put words to it at all, but may suspect in their hearts that the universe really doesn't know what the hell is going on and consists of a zillion trillion billion possibilities, and could become any one of them if a trained mind rigid with quantum certainty was inserted into the crack and twisted; that, if you really had to make someone's hat explode, all you needed to do was twist into that universe where a large number of hat molecules all decide at the same time to bounce off in different directions.Younger witches, on the other hand, talk about it all the time and believe it involves crystals, mystic forces, and dancing about without yer drawers on. Everyone may be right, all at the same time. That's the thing about quantum.”