Sweat the small stuff. Without letting anyone see you sweat.

Spaceflight isn't just about doing experiments, it's about an extension of human culture.

Our role is to develop techniques that allow us to provide emergency life-saving procedures to injured patients in an extreme, remote environment without the presence of a physician.

Don't let life randomly kick you into the adult you don't want to become

Almost everything worthwhile carries with it some sort of risk.

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

Every single day you're the result of what you did on the days prior.

Focus on the journey, not on arriving at a certain destination.

Remember, nobody changes the world on their own.

Every decision you make, from what you eat to what you do with your time tonight, turns you into who you are tomorrow and the day after that.

The cool things about space is when you put your pants on here, you can put them on two legs at a time.

I want to continue to speak out on issues that matter to me. I want to have even more of a voice.

I do try and stay away from the stereotype and getting typecast.

Life is a gift horse in my opinion.

Fiction begins with the senses, and the senses go to work in a place.

The unlimited capacity of the plant world to sustain man at his highest is a region as yet unexplored by modern science.

When things go wrong, this is what you should do. Make good art.

I've never really had much of a career plan, and interesting opportunities kept cropping up.

While the angels sing, I'd ask you to marry me, give you the sun for a diamond ring, if I could do those things.

When the rhythm and night ride, no heart can hide.