Remember, nobody changes the world on their own.

Ultimately, leadership is not about glorious crowning acts. It's about keeping your team focused on a goal and motivated to do their best to achieve it, especially when the stakes are high and the consequences really matter. It is about laying the groundwork for others' success, and then standing back and letting them shine.

Anticipating problems and figuring out how to solve them is actually the opposite of worrying: it's productive.

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.

I wasn’t destined to be an astronaut. I had to turn myself into one.

There is a sunrise or a sunset from space every 92 minutes so there is an incredible amount of beauty to see from up there.

I've been lucky enough to fly to space twice.