Decide in your heart of hearts what really excites and challenges you, and start moving your life in that direction

My favourite city is Moscow, because of its history, which I find fascinating. As I learned to speak Russian, it made it even more interesting.

Almost everything worthwhile carries with it some sort of risk.

You can't just ignore spacewalking suit; it partially defines the experience. So maybe the most difficult thing is becoming completely attuned to efficiently wearing a garment that is so inhibiting to motion, and making it look effortless, as if it's the most natural thing to be out there on a spacewalk.

Remember, nobody changes the world on their own.

The danger is different from the fear. ... [practice] what to do if things go wrong, as well as right.

I'm really looking forward to it, if you can imagine floating weightless, watching the world pour by through the big bay window of the space station playing a guitar; just a tremendous place to think about where we are in history.