Every single day you're the result of what you did on the days prior.

I wasn’t destined to be an astronaut. I had to turn myself into one.

Doing a space walk. It is one of the most rare human experiences. To leave your spaceship and go outside, so that you are alone in the universe with Earth distant and the universe around you. That is amazing.

Almost everything worthwhile carries with it some sort of risk.

The rough and ready improvisational quality to life on board the International Space Station is reminiscent of a long trip in a sailboat: privacy and fresh produce are in short supply, hygiene is basic, and a fair amount of the crew's time is spent just on maintaining and repairing the craft.

I'm not a wealthy person and I don't think that I would be able to prioritize that much money to go for a ride to a place that I have already lived. But if the price comes down or I win a lottery or something, why not?

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