Anything you dream is fiction, and anything you accomplish is science, the whole history of mankind is nothing but science fiction.

Science fiction is any idea that occurs in the head and doesn't exist yet, but soon will, and will change everything for everybody, and nothing will ever be the same again. As soon as you have an idea that changes some small part of the world you are writing science fiction. It is always the art of the possible, never the impossible.

The train skimmed on softly, slithering, black pennants fluttering, black confetti lost on its own sick-sweet candy wind, down the hill, with the two boys pursuing, the air was so cold they ate ice cream with each breath.

They stood there, King of the Hill, Top of the Heap, Ruler of All They Surveyed, Unimpeachable Monarchs and Presidents, trying to understand what it meant to own a world and how big a world really was.

Digression is the soul of wit.

Fantasies are things that can't happen, and science fiction is about things that can happen.

Every time you take a step, even when you don't want to. . . . When it hurts, when it means you rub chins with death, or even if it means dying, that's good. Anything that moves ahead, wins. No chess game was ever won by the player who sat for a lifetime thinking over his next move.