Where any answer is possible, all answers are meaningless.

Fifty years," I hackneyed, "is a long time." "Not when you're looking back at them," she said. "You wonder how they vanished so quickly.

Experimentation is the least arrogant method of gaining knowledge. The experimenter humbly asks a question of nature.

On Earth, we are unmanned by our longing for a pastoral past that never really existed; and that, if it had existed, could never exist again...on the Moon, there is no past to long for or dream about. There is no direction but forward.

Writing is a lonely job. Even if a writer socializes regularly, when he gets down to the real business of his life, it is he and his type writer or word processor. No one else is or can be involved in the matter.

They don't want equal time - they want all the time there is.

Intelligence is an accident of evolution, and not necessarily an advantage.