The greatest gain from space travel consists in the extension of our knowledge. In a hundred years this newly won knowledge will pay huge and unexpected dividends.

My friends they were dancing here in the streets of Huntsville when our first satellite orbited the Earth. They were dancing again when the first Americans landed on the Moon. I'd like to ask you, don't hang up your dancing slippers.

It will free man from the remaining chains, the chains of gravity which still tie him to this planet.

Nature does not know extinction; all it knows is transformation. ... Everything science has taught me-and continues to teach me-strengthens my belief in the continuity of our spiritual existence after death. Nothing disappears without a trace.

It takes sixty-five thousand errors before you are qualified to make a rocket.

Crash programs fail because they are based on theory that, with nine women pregnant, you can get a baby in a month.

If we were to start today on an organized and well-supported space program I believe a practical passenger rocket can be built and tested within ten years.