“From somewhere, back in my youth, heard Prof say, 'Manuel, when faced with a problem you do not understand, do any part of it you do understand, then look at it again.' He had been teaching me something he himself did not understand very well—something in math—but had taught me something far more important, a basic principle.”

“when faced with a problem you do not understand, do any part of it you do understand, then look at it again.”

“You are telling me that I did something because I was going to do something.”“Well, didn’t you? You were there.”“No, I didn’t—no… well, maybe I did, but it didn’t feel like it.”“Why should you expect it to? It was something totally new to your experience.”“But… but—” Wilson took a deep breath and got control of himself. Then he reached back into his academic philosophical concepts and produced the notion he had been struggling to express. “It denies all reasonable theories of causation. You would have me believe that causation can be completely circular. I went through because I came back from going through to persuade myself to go through. That’s silly.”“Well, didn’t you?"~ By His Bootstraps / Robert A. Heinlein”

“Allie, what do the Stars tell me to do? You know I don't understand the scientific part.”

“I’ve been kissed by men who did a very good job. But they don’t give kissing their whole attention. They can’t. No matter how hard they try parts of their minds are on something else. Missing the last bus—or their chances of making the gal—or their own techniques in kissing—or maybe worry about jobs, or money, or will husband or papa or the neighbors catch on. Mike doesn’t have technique . . . but when Mike kisses you he isn’t doing anything else. You’re his whole universe . . . and the moment is eternal because he doesn’t have any plans and isn’t going anywhere. Just kissing you.”

“Thing that got me was not her list of things she hated, since she was obviously crazy as a Cyborg, but fact that always somebody agreed with her prohibitions. Must be a yearning deep in human heart to stop other people from doing as they please. Rules, laws — always for other fellow. A murky part of us, something we had before we came down out of trees, and failed to shuck when we stood up. Because not one of those people said: "Please pass this so that I won't be able to do something I know I should stop." Nyet, tovarishchee, was always something they hated to see neighbors doing. Stop them "for their own good" — not because speaker claimed to be harmed by it.”

“A slave cannot be freed, save he do it himself. Nor can you enslave a free man; the very most you can do is kill him!”