The important thing is to be in love with something.

[His] library was a fine dark place bricked with books, so anything could happen there and always did. All you had to do was pull a book from the shelf and open it and suddenly the darkness was not so dark anymore.

We Earth Men have a talent for ruining big, beautiful things. The only reason we didn't set up hot-dog stands in the midst of the Egyptian temple of Karnak is because it was out of the way and served no large commercial purpose.

I'm numb and I'm tired. Too much has happened today. I feel as if I'd been out in a pounding rain for forty-eight hours without an umbrella or a coat. I'm soaked to the skin with emotion.

The history of science fiction started in the caves 20,000 years ago. The ideas on the walls of the cave were problems to be solved. It's problem solving. Primitive scientific knowledge, primitive dreams, primitive blueprinting: to solve problems.

I want to feel all there is to feel, he thought. Let me feel tired, now, let me feel tired. I mustn't forget, I'm alive, I know I'm alive, I mustn't forget it tonight or tomorrow or the day after that.

Gardening is the handiest excuse for being a philosopher. Nobody guesses, nobody accuses, nobody knows, but there you are, Plato in the peonies, Socrates force-growing his own hemlock. A man toting a sack of blood manure across his lawn is kin to Atlas letting the world spin easy on his shoulder.