The problem is that Americans would like to be independent of the rest of the world ... Except the world ain't that way. Trying to be independent of the rest of the world is to commit suicide.

Don't ask your readers to admire your words when you want them to believe your story.

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.

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.

My first published novel was written for teenagers, and there were rules laid down by the publisher: no sex, no smoking, no swearing. I blew up entire solar systems, I consigned billions of people to horrible death; they didn't seem to mind that at all. But no hanky-panky.

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.

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.