"Why do so many people dislike science fiction? The answer goes like this: You have to think of science fiction in contrast to its nearest competitor, heroic fantasy. In heroic fantasy, by and large, things are pretty stable, and then some terrible evil comes along that's going to take over the world. People have to fight it. In the end they win, of course, so the earth is restored to what it was. The status quo comes back. Science fiction's quite different. With science fiction, the world's in some sort of a state, and something awful happens. It may not be evil, it may be good or neutral, just an accident. Whatever they do in the novel, at the end the world is changed forever. That's the difference between the two genres — and it's an almighty difference! And the truth is science fiction, because we all live in a world that's changed forever. It's never going to go back to what it was in the '60s or the '70s or the '30s, or whatever. It's changed."

“One of the characteristics of age was that all avenues of talk led backward in time.”

“You know that if you had been in charge of creation you would have found some medium less heart-breaking than Time to stage it in.”

“If you think with your emotions, slight glandular changes are sufficient to revise your entire outlook.”

“Why don’t you go somewhere quietly and consult your history books if you have no consciences to consult?”

“An overcrowded world is the ideal place in which to be lonely.”

“Frank II liked Spain. Philip's capital was gayer, warmer, and more sanitary than London. It was intoxicating to enjoy the best of both courts. It proved also extremely remunerative: the shared consciousness of Frank I and II was by far the quickest communicational link between the two rival countries, and as such was worth money. Not that Frank revealed his secret to a soul, but he let it be known he had a fleet of capable spies who moved without risk of detection between England and Spain. Burly Lord Burleigh beamed upon him. So did the Duke of Medina Sidonia.”