I'm convinced that before the year 2000 is over, the first child will have been born on the moon.

With our present knowledge, we can respond to the challenge of stellar space flight solely with intellectual concepts and purely hypothetical analysis. Hardware solutions are still entirely beyond our reach and far, far away.

Basic research is what I am doing when I don't know what I am doing.

There are flying grandfathers. But I intend to be an orbiting grandfather.

The same forces of nature which enable us to fly to the stars, enable us also to destroy our star.

My experiences with science led me to God. They challenge science to prove the existence of God. But must we really light a candle to see the sun?

There is just one thing I can promise you about the outer-space program - your tax-dollar will go further.