Shoot for the stars but if you happen to miss shoot for the moon instead.

No matter when you had been to this spot before, a thousand years ago or a hundred thousand years ago, or if you came back to it a million years from now, you would see some different things each time, but the scene would be generally the same.

The one thing I regret was that my work required an enormous amount of my time, and a lot of travel.

If you don't know who you are, a university is an expensive place to find out.

Well, I think we tried very hard not to be overconfident, because when you get overconfident, that's when something snaps up and bites you.

There are people I'll always love to listen to, and I'm always ending up discovering new songs by them, which is crazy. Like Stevie Wonder.

I thought the attractions of being an astronaut were actually, not so much the Moon, but flying in a completely new medium.