No dream is too high for those with their eyes in the sky!

A mind concerned about danger is a clouded mind. It's paralyzing.

In space, you don't get that much noise. Noise doesn't propagate in a vacuum.

There are a lot of reasons for not doing something. And if humanity had come up with all the reasons for not doing something we wouldn't have spread across the Earth the way we have. There's a curiosity, and I would submit that that curiosity will put human beings on the surface of Mars.

Six out of seven times we landed successfully [on the Moon]. I wanted to be a part of that and I was a part of that, so my personal feeling is of great gratefulness for having somehow been in a position to have been given the opportunity to be on that first landing. That's a marvelous experience for a little kid that grew up in New Jersey. So I'm very thankful, and I asked the whole world to give thanks once we successfully landed.

Having walked on the Moon, I know something about what we need to explore, really explore, in space.

You can never tell when a commercial space venture will suddenly become viable.