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.

A good engineer gets stale very fast if he doesn't keep his hands dirty.

Man is not made for space. But with the help of biologists and medical doctors, he can be prepared and accommodated.

Our sun is one of a 100 billion stars in our galaxy. Our galaxy is one of billions of galaxies populating the universe. It would be the height of presumption to think that we are the only living thing in that enormous immensity.

It was very successful, but it fell on the wrong planet.

To simply dismiss the concept of God as being unscientific is to violate the very objectivity of science itself.

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