I think most astronauts are not risk takers. We take calculated risks for something that we think is worthwhile.

My odyssey to become an astronaut kind of started in grad school, and I was working, up at MIT, in space robotics-related work; human and robot working together.

I applied to be an astronaut four times. I was rejected three times before I was accepted. So, it's about that, not - following your dream and not giving up.

The hardest thing for me as an astronaut was to improve my swimming skills.

We don’t live in an ideal world, but in a world dominated by sinful, selfish desires.

Nationality is the miracle of political independence race is the principle of physical analogy.

Love, however, is very materially assisted by a warm and active imagination: which has a long memory, and will thrive, for a considerable time, on very slight and sparing food.

I'm a dude, obviously, and when I'm not in a relationship, I don't do laundry until I want to. But if I live with a girl, you have to do it when she wants to or when we want to, which sucks.

I'm very homework-oriented - I'm a little Tracy Flick-ish.

The most destructive criticism is indifference.

Cynicism's always a pose - always.

When it comes to dating, you're not as crazy as you think you are.

[Detractors] are just wrong, and that's okay. They just don't see it yet. That's what I would tell myself to keep those moments of doubt, only moments.

Truth doesn't always heal a wounded soul.