By looking at the difference between perceived danger and actual danger, you can fundamentally change your reaction.

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 never wanted to be safe... I wanted to be good.

Love never had a stronger pull, then from Souls coming together for a joint purpose.

Gratitude is the expression of love for the earth and for the humanity, for the abundance of life and its untold beauty.

Where ignorance prevails, there an opportunity exists but the possessor of ignorance shall always be ignorant of opportunities

Never reach out your hand unless you're willing to extend an arm.

Genre, to me, is not all that important, and it never has been.

The past is the only dead thing that smells sweet.

Sing your death song and die like a hero going home.

It is better to read a little and thoroughly than cram a crude undigested mass into my head, though it be great in quantity.

I talk with Gary [Johnson] every other day, we're on different coasts usually but we keep in touch and - yeah, no I do not agree with that release.