If you aim higher than you expect, you could reach higher than you dreamed.

The best way of learning about anything is by doing.

I enjoy the company of other people. That's where I get most of my satisfaction from

There is no such thing as a boring person: everyone has stories and insights worth sharing. While on the road, we let our phones or laptops take up our attention. By doing that, we might miss out on the chance to learn and absorb ideas and inspiration from an unexpected source: our fellow travelers.

I've used the Phoenix Centrifuge to replicate what the body's going to go through on the flight up. I've also done some gravity tests with ZERO-G [a charter-flight service in Arlington, Va., that uses modified Boeing 727s to simulate weightlessness], which went great.

If young people do see me as an example (I'm very flattered if they do!) I hope it is as someone who will go out there and live life to the full.

It's better to say nothing than spend 1,000 words or an hour speech saying nothing. Get to the point.