If you really want to make a difference, whether it’s in helping other people, or whether it’s in fighting for your country, or whether it’s in the political arena, or journalism, or physics, you’ve got to persevere. You’ve got to understand that there are going to be some enormous bumps in the road.

Writing became a therapy. First of all, it meant I was reconstructing my own existence. It was also an act of defiance. I wasn’t supposed to write. ... I evolved all kinds of mental exercises, even went back to those subjects which I said I hated in school, in particular mathematics. ... You know, anything to keep the mind alive.

Look, life is pretty dreadful most of the time. Even in the country that's so pretty with the flowers and leaves and sunshine. And I was abandoned when he died! I'm alone. I feel like an old bubba. And I'm not kind all of the time, I'm not nice all the time.

God has never let me down. He’s a key factor in guiding my decisions and feeling safe within them. My wife and I suffered three miscarriages, one of them quite late in the pregnancy. Without faith, we would have retreated into our own corners to lick our wounds, but our love increased.

No, I didn’t. Certainly when I was in the one-room country school you described, I guess my ambition at that point was to get through with a creditable performance. Really, of course, nobody thought about astronauts in those days, but I didn’t really even start thinking about airplanes very much when I was in grade school. So that interest sort of came later on.

In those days, talking in terms of a hero — it had to be Charles Lindbergh. I was very young when he flew across the Atlantic, and very impressed.

My wife and I have always tried to explain to the girls — even when I had to go off on nine-month cruises in the Mediterranean or in the Pacific — why I was doing it, and what it was all about, that I felt that I could contribute to the military.

A little bit of overconfidence perhaps. A lack of attention to duty. Little insidious things that happened. You had this great team of dedicated, qualified people, but they get a little bit complacent, and boom! Pretty soon something goes wrong.

It would have to be that one lady teacher in grade school. All six grades, one room, 25 students. She was about nine feet tall as I recall and a very tough disciplinarian. Always had the ruler ready to whack the knuckles if somebody got out of hand. She ran a very well-disciplined group. I think most of the youngsters responded to that. There were one or two that couldn’t handle it and obviously they dropped by the wayside. But that still sticks out in my mind.

To me and, I think, to all of us, it was a realization that our world is finite, it is small, it is fragile, and we need to start thinking about how to take care of it.