“My personal theory is that he has a very firm grasp upon reality, it's simply not a reality the rest of us have ever met before.”

“at least nine-tenths of all the original reality ever created lies outside the multiverse, and since the multiverse by definition includes absolutely everything that is anything, this puts a bit of a strain on things.Outside the boundaries of the universes lie the raw realities, the could-have-beens, the might-bes, the never-weres, the wild ideas, all being created and uncreated chaotically like elements in fermenting supernovas.Just occasionally where the walls of the worlds have worn a bit thin, they can leak in.”

“Reality is not digital, an on-off state, but analog. Something gradual. In other words, reality is a quality that things possess in the same way that they possess, say, weight. Some people are more real than others, for example. It has been estimated that there are only about five hundred real people on any given planet, which is why they keep unexpectedly running into one another all the time.”

“There is a plain under a dim sky. It is covered with gentle rolling curves that might remind you of something else if you saw it from a long way away, and if you did see it from a long way away you'd be very glad that you were, in fact, a long way away.Three gray figures floated just above it. Exactly what they were can't be described in normal language. Some people might call them cherubs, although there was nothing rosy-cheeked about them. They might be rumored among those who see to it that gravity operates and that time stays separate from space. Call them auditors. Auditors of reality.They were in conversation without speaking. They didn't need to speak. They just changed reality so that they had spoken. One said, It has never happened before. Can it be done? One said, It will have to be done. There is a personality. Personalities come to an end. Only forces endure. It said this with satisfaction. One said, Besides... there have been irregularities. Where you get personality, you get irregularities. Well-known fact. One said, He has worked inefficiently? One said, No. We can't get him there. One said, That is the point. The word is him. Becoming a personality is inefficient. We don't want it to spread. Supposing gravity developed a personality? Supposing it decided to like people? One said, Got a crush on them, that sort of thing? One said, in a voice that would have been even chillier if it was not already at absolute zero, No. One said, Sorry. Just my little joke. One said, Besides, sometimes he wonders about his job. Such speculation is dangerous. One said, No argument there. One said, Then we are agreed? One, who seemed to have been thinking about something, said, Just one moment. Did you not just use the singular pronoun "my?" Not developing a personality, are you? One said, guiltily, Who? Us? One said, Where there is personality, there is discord. One said, Yes. Yes. Very true. One said, All right. But watch it in future. One said, Then we are agreed? They looked up at the face of Azrael, outlined against the sky. In fact, it was the sky. Azrael nodded, slowly. One said, Very well. Where is this place? One said, It is the Discworld. It rides through space on the back of a giant turtle. One said, Oh, one of that sort. I hate them. One said, You're doing it again. You said "I." One said, No! No! I didn't! I never said "I!"... oh, bugger... It burst into flame and burned in the same way that a small cloud of vapor burns, quickly and with no residual mess. Almost immediately, another one appeared. It was identical in appearance to its vanished sibling. One said, Let that be a lesson. To become a personality is to end. And now... let us go.”

“Or -- and this she knew was a far more accurate way of looking at it -- the book was true and reality was lying.”

“No other library anywhere, for example, has a whole gallery of unwritten books - books that would have been written if the author hadn't been eaten by an alligator around chapter 1, and so on. Atlases of imaginary places. Dictionaries of illusory words. Spotter's guides to invisible things. Wild thesauri in the Lost Reading Room. A library so big that it distorts reality and has opened gateways to all other libraries, everywhere and everywhen...”

“A lie can run round the world before the truth has got its boots on.”