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

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.

Fear is a probability by its own cause of actions, if we live by it we lose all the possibilities of endurance

Keep an eye on your responses. Strong responses are about you more than them.

Talk to yourself like you would to someone you love.

She became a frame for the picture that was her son and daughter.

Your life must not be different from your dreams. You must live a dream

Companies should be able to share specific threat information with the government without the prospect of lawsuits hanging over their head.

Why the devil was my husband positively grinning - and with what looked remarkably like relief?

Profuseness is a cruel and crafty demon, that gradually involves her followers in dependence and debt; that is, fetters them with irons that enter into their souls.

I'll be back. I'll be black. I'll be white black.

More often than not, media coverage now mentions HIV-positive people in criminal contexts.