“First Thoughts are the everyday thoughts. Everyone has those. Second Thoughts are the thoughts you think about the way you think. People who enjoy thinking have those. Third Thoughts are thoughts that watch the world and think all by themselves. They’re rare, and often troublesome. Listening to them is part of witchcraft.”

“First Sight means you can see what really is there, and Second Thoughts mean thinking about what you are thinking. And in Tiffany's case, there were sometimes Third Thoughts and Fourth Thoughts although these...sometimes led her to walk into doors.”

“That's Third Thoughts for you. When a huge rock is going to land on your head, they're the thoughts that think: Is that an igneous rock, such as granite, or is it sandstone?”

“I often thought that everyone has their, you know, natural age.”

“Colon thought Carrot was simple. Carrot often struck people as simple. And he was.Where people went wrong was thinking that simple meant the same thing as stupid.”

“Animal minds are simple, and therefore sharp. Animals never spend time dividing experience into little bits and speculating about all the bits they've missed. The whole panoply of the universe has been neatly expressed to them as things to (a) mate with, (b) eat, (c) run away from, and (d) rocks. This frees the mind from unnecessary thoughts and gives it a cutting edge where it matters. Your normal animal, in fact, never tries to walk and chew gum at the same time. The average human, on the other hand, thinks about all sorts of things around the clock, on all sorts of levels, with interruptions from dozens of biological calendars and timepieces. There's thoughts about to be said, and private thoughts, and real thoughts, and thoughts about thoughts, and a whole gamut of subconscious thoughts. To a telepath the human head is a din. It is a railway terminus with all the Tannoys talking at once. It is a complete FM waveband- and some of those stations aren't reputable, they're outlawed pirates on forbidden seas who play late-night records with limbic lyrics.”

“Granny bit her lip. She was never quite certain about children, thinking of them - when she thought about them at all – as coming somewhere between animals and people. She understood babies. You put milk in one end and kept the other as clean as possible. Adults were even easier, because they did the feeding and cleaning themselves. But in between was a world of experience that she had never really inquired about. As far as she was aware, you just tried to stop them catching anything fatal and hoped that it would all turn out all right.”