There are some ideas so stupid that only intellectuals can believe in them, particularly left-wing intellectuals.

What five books would I like to be remembered for? Well... Tau Zero, I like that one especially. It was somewhat of a tour de force, and I think it got across what I was trying for.

Give fear no hold on you. Keep sinews loose and senses open, ready at every instant to flow with the rush of action.

Anybody can find infinite Mandelbrot figures in his navel.

A fanatic is a man who, when he's lost sight of his purpose, redoubles his effort.

I wrote the first book, Harvest of Stars, and as I was writing it, I saw that certain implications had barely been touched on... It's perfectly obvious that two completely revolutionary things are going on, with cybernetics, and biological science.

There are some ideas so stupid that only intellectuals can believe in them, particularly left-wing intellectuals.