“It is a well-known established fact throughout the many-dimensional worlds of the multiverse that most really great discoveries are owed to one brief moment of inspiration. There's a lot of spadework first, of course, but what clinches the whole thing is the sight of, say, a falling apple or a boiling kettle or the water slipping over the edge of the bath. Something goes click inside the observer's head and then everything falls into place. The shape of DNA, it is popularly said, owes its discovery to the chance sight of a spiral staircase when the scientist‘s mind was just at the right receptive temperature. Had he used the elevator, the whole science of genetics might have been a good deal different.This is thought of as somehow wonderful. It isn't. It is tragic. Little particles of inspiration sleet through the universe all the time traveling through the densest matter in the same way that a neutrino passes through a candyfloss haystack, and most of them miss.Even worse, most of the ones that hit the exact cerebral target, hit the wrong one.For example, the weird dream about a lead doughnut on a mile-high gantry, which in the right mind would have been the catalyst for the invention of repressed-gravitational electricity generation (a cheap and inexhaustible and totally non-polluting form of power which the world in question had been seeking for centuries, and for the lack of which it was plunged into a terrible and pointless war) was in fact had by a small and bewildered duck.By another stroke of bad luck, the sight of a herd of wild horses galloping through a field of wild hyacinths would have led a struggling composer to write the famous Flying God Suite, bringing succor and balm to the souls of millions, had he not been at home in bed with shingles. The inspiration thereby fell to a nearby frog, who was not in much of a position to make a startling contributing to the field of tone poetry.Many civilizations have recognized this shocking waste and tried various methods to prevent it, most of them involving enjoyable but illegal attempts to tune the mind into the right wavelength by the use of exotic herbage or yeast products. It never works properly.”

“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.”

“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.”

“Like sheep which, having been driven to a pasture, can now spread out at their leisure, the clouds began to drift. Afternoon sunlight sliced through into the still waters. The boomerang hung in the sky, and the boy thought he would have to find a new word for the way the colours glowed. In the meantime, he looked down at the water and tried out the word he'd been taught by his grandfather, who'd been taught it by his grandfather, and which had been kept for thousands of years for when it would been needed. It meant the smell after rain. It had, he thought, been well worth waiting for.”

“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.”

“Some people have inspired whole countries to great deeds because of the power of their vision. And so could he. Not because he dreams about marching hordes, or world domination, or an empire of a thousand years. Just because he thinks that everyone’s really decent underneath and would get along just fine if only they made the effort, and he believes that so strongly it burns like a flame which is bigger than he is. He’s got a dream and we’re all part of it, so that it shapes the world around him. And the weird thing is that no one wants to disappoint him. It’d be like kicking the biggest puppy in the universe. It’s a kind of magic.”

“...for the first time Rincewind saw the troll.It wasn’t half so bad as he had imagined.Umm, said his imagination after a while.It wasn’t that the troll was horrifying. Instead of the rotting, betentacled monstrosity he had been expecting Rincewind found himself looking at a rather squat but not particularly ugly old man who would quite easily have passed for normal on any city street, always provided that other people on the street were used to seeing old men who were apparently composed of water and very little else. It was as if the ocean had decided to create life without going through all that tedious business of evolution, and had simply formed a part of itself into a biped and sent it walking squishily up the beach.(…) How does he hold himself together, his mind screamed at him. Why doesn’t he spill?”