Everyone who's been in space would, I'm sure, welcome the opportunity for a return to the exhilarating experiences there.

I didn't start skiing until I was 50. My wife Lois taught me how to ski. I'm proficiently conservative.

Nobody ever asks who was the seventh person on the Moon. The only thing they know is who's number one and who's number two. Does anybody know who the last man was?

We must still think of ourselves as pioneers to understand the importance of space.

There's a tremendously satisfying freedom associated with weightlessness. It's challenging in the absence of traction or leverage, and it requires thoughtful readjustment. I found the experience of weightlessness to be one of the most fun and enjoyable, challenging and rewarding, experiences of spaceflight. Returning to Earth brings with it a great sense of heaviness, and a need for careful movement. In some ways it's not too different from returning from a rocking ocean ship.

Over the years, I think I've matured in my spiritual evolution and development to understand a bit more than the narrow religious thinking - to move beyond that through a sort of perfection of the grandiose nature of the universe, and how perfect it is it in its sense and how satisfied we should all be in our place in that.

I want to reach a new generation. That's why I am Twittering now. I have a BlackBerry, an iPhone and a Mac.