Apollo was a big, unwieldy vehicle. I had a problem with the flight controllers over that. It would try to fare its way like an airplane.

When people have asked if I'd like to go in the Shuttle, I said you don't get to fly it, except for landing, which I'd love to do. I wouldn't go unless I could command it

I left Earth three times and found no other place to go. Please take care of Spaceship Earth.

You don't raise heroes, you raise sons. And if you treat them like sons, they'll turn out to be heroes, even if it's just in your own eyes.

I don't go along with going to Moon first to build a launch pad to go to Mars. We should go to Mars from Earth orbit. We have already been to the Moon; we've already practiced.

I don't think the space station will ever do anything for exploration. Putting people up there for a year or more is the only way you will get anywhere near the exploration concept

He who commands an Apollo flight will not command a second one