When I start on a book, I have been thinking about it and making occasional notes for some time... So I have lots of theme, locale, subjects and technical ideas... I don't worry about long periods of not doing anything. I know my subconscious is busy.

Science is the only religion of mankind.

Now, before you make a movie, you have to have a script, and before you have a script, you have to have a story; though some avant-garde directors have tried to dispense with the latter item, you'll find their work only at art theaters.

The future is not to be forecast, but created.

The best proof of intelligent life in space is that it hasn't come here.

The truth, as always, will be far stranger.

I've been saying for a long time that I'm hoping to find intelligent life in Washington.