The history of science fiction started in the caves 20,000 years ago. The ideas on the walls of the cave were problems to be solved. It's problem solving. Primitive scientific knowledge, primitive dreams, primitive blueprinting: to solve problems.

The zipper displaces the button and a man lacks just that much time to think while dressing at dawn, a philosophical hour, and thus a melancholy hour.

We have our Arts so we won't die of Truth.

Everyone must leave something behind when he dies, my grandfather said. A child or a book or a painting or a house or a wall built or a pair of shoes made. Or a garden planted. Something your hand touched some way so your soul has somewhere to go when you die, and when people look at that tree or that flower you planted, you're there.

In our time the search for extraterrestrial life will eventually change our laws, our religions, our philosophies, our arts, our recreations, as well as our sciences. Space, the mirror, waits for life to come look for itself there.

I've never worked a day in my life. The joy of writing has propelled me from day to day and year to year. I want you to envy me, my joy. Get out of here tonight and say: 'Am I being joyful?' And if you've got a writer's block, you can cure it this evening by stopping whatever you're writing and doing something else. You picked the wrong subject.

Sometimes I think I understand everything. Then I regain consciousness