“In an ultimate sense I cannot know what I do in this place - yet I do ultimate things. Essentially I cannot know what I do - yet I do essential things. Irreversible, terminal things. I stand in the dark with a pick in my hand, striking at heads! I need - more desperately than my children need me - a way of seeing in the dark.”

“I cannot accept merely...I do not do anything merely.”

“My ignorance is essential. I do not write what I know but what I need to know.”

“What did I expect of him? Very little, I promise you. One more dented little face. One more adolescent freak. The usual unusual. One great thing about being in the adjustment business: you're never short of customers.”

“Worship isn't destructive, Martin. I know that. I don't. I only know it's the core of his life. What else has he got? He can hardly read. He knows no physics or engineering to make to world real for him. No paintings to show him how others have enjoyed it. No music except television jingles. No history except tales from a desperate mother. No friends. Not one kid to give him a joke, or make him know himself more moderately. He's a modern citizen for whom society doesn't exist.”

“All reined up in old language and old assumptions, straining to jump clean-hoofed on to a whole new track of being I only suspect is there. I can't see it, because my educated, average head is being held at the wrong angle. I can't jump because the bit forbids it, and my own basic force - my horsepower, if you like - is too little.”

“You should climb around inside my brain, Dan. It's like this dark room surrounded by quicksand.""I know what you mean," her brother said quietly. "I hate being in my brain sometimes. I have to get out.""What do you do?" Amy asked.Dan shrugged "I go to other places. My toes. My shoulders. But mostly here." He tapped his chest and immediately reddened. "I know. It's stupid.""Not really," Amy said. "I wish I could do that, too.”