I think it's perfectly OK to exploit the moon. Largely for two reasons: there's no life there, and it is close enough and rich enough in resources to be economically useful to Earth. In the final analysis, everything we do in space, if it does not help the people of Earth, all the people, it's not going to happen.

Up here [in space], you're free. Really free, for the first time in your life. All the laws and rules and prejudices they've been dumping on you all your life . . . they're all down there. Up here it's a new start. You can be yourself and do your own thing . . . and nobody can tell you different.

As long as we're tied to Middle Eastern oil we're tied to Middle Eastern politics. We're hostages to the terrorists and nutcases who want to wipe out Israel and the United States because we support Israel.

A new space race has begun, and most Americans are not even aware of it. This race is not [about] political prestige or military power. This new race involves the whole human species in a contest against time.

The Old Ones knew that life is not rare, but precious; not fragile, but vulnerable. Life is as deep as the seas in which it was born, as strong as the mountains that give it shelter, as universal as the stars themselves.

Feeding the starving poor only increases their number.

In science there is a dictum: don't add an experiment to an experiment. Don't make things unnecessarily complicated. In writing fiction, the more fantastic the tale, the plainer the prose should be. Don't ask your readers to admire your words when you want them to believe your story.