Every decision you make, from what you eat to what you do with your time tonight, turns you into who you are tomorrow and the day after that.

My optimism and confidence come not from feeling I'm luckier than other mortals, and they sure don't come from visualizing victory. They're the result of a lifetime spent visualizing defeat and figuring out how to prevent it. Like most astronauts, I'm pretty sure that I can deal with what life throws at me because I've thought about what to do if things go wrong, as well as right. That's the power of negative thinking.

The emotional build-up and anticipation if you travel at Christmas can make it harder to enjoy a trip. I think sometimes it is better to travel outside of conventional holiday times for that reason.

I've been lucky enough to fly to space twice.

The cool things about space is when you put your pants on here, you can put them on two legs at a time.

By looking at the difference between perceived danger and actual danger, you can fundamentally change your reaction.

Anticipating problems and figuring out how to solve them is actually the opposite of worrying: it's productive.