“Humans! They lived in a world where the grass continued to be green and the sun rose every day and flowers regularly turned into fruit, and what impressed them? Weeping statues. And wine made out of water! A mere quantum-mechanistic tunnel effect, that'd happen anyway if you were prepared to wait zillions of years. As if the turning of sunlight into wine, by means of vines and grapes and time and enzymes, wasn't a thousand times more impressive and happened all the time...”

“Time was something that largely happened to other people; he viewed it in the same way that people on the shore viewed the sea. It was big and it was out there, and sometimes it was an invigorating thing to dip a toe into, but you couldn't live in it all the time. Besides, it always made his skin wrinkle.”

“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.”

“The shortest unit of time in the multiverse is the New York Second, defined as the period of time between the traffic lights turning green and the cab behind you honking.”

“Vimes died. The sun dropped out of the sky, giant lizards took over the world, and the stars exploded and went out and all hope vanished and gurgled into the sinktrap of oblivion. And gas filled the firmament and combusted and behold! There was a new heaven - or possibly not. And Disc and Io and and possibly verily life crawled out of the sea - or possibly didn't because it had been made by the gods, and lizards turned to less scaly lizards - or possibly did not. And lizards turned into birds and bugs turned into butterflies and a species of apple turned into banana and a kind of monkey fell out of a tree and realised life was better when you didn't have to spend your time hanging onto something. And in only a few billion years evolved trousers and ornamental stripey hats. Lastly the game of Crocket. And there, magically reincarnated, was Vimes, a little dizzy, standing on the village green looking into the smiling countenance of an enthusiast.”

“Unseen University was much bigger on the inside. Thousands of years as the leading establishment of practical magic in a world where dimensions were largely a matter of chance in any case had left it bulging in places where it shouldn't have places. There were rooms containing rooms which, if you entered them, turned out to contain the room you'd started with, which can be a problem if you are in a conga line.”

“Books bend space and time. One reason the owners of those aforesaid little rambling, poky secondhand bookshops always seem slightly unearthly is that many of them really are, having strayed into this world after taking a wrong turning in their own bookshops in worlds where it is considered commendable business practice to wear carpet slippers all the time and open your shop only when you feel like it.”