I think there are huge lessons there, for young people who are getting started in life, as well as other people. And that is, to take responsibility for your own life. Only you are responsible for the course you take from there.

I’m not a risk taker. But astronauts are professionals, so you get out on the field and play ball. I tried to take it in stride because that’s what I had to do to get into space. That’s where I belong, and I’m pretty good at it.

Getting out of the comfortable path, that's what exploration is all about.

Statistically it's a certainty there are hugely advanced civilizations, intelligences, life forms out there. I believe they're so advanced they're even doing interstellar travel. I believe it's possible they even came here.

It's hard to say what drives a three year-old, but I think I had a sense that nature was my solace, and nature was a place in which there was beauty, in which there was order.

I'm such a long-term investor, I've never really let go and celebrated what I did with the Hubble telescope.

Whitman expressed the whole universe in his poetry and in his catalogues. That attitude almost defines what we call American romanticism, or American transcendentalism. I feel particularly close to them, because I am now out in the universe. I’m in a position to see nature from another point of view, to be outside the earth and see the big picture.