No one ever accomplished anything great sitting down.

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.

At the MoorWanderer in the black wind

Step and land, step and land. That's all travel was. Throw in some running and a change of scenery. No big deal, right? And so, off he went. Off they went together.

Trane was the father. Pharoah was the son. I was the holy ghost.

Society may predict, but only I can determine my destiny.

The decent docent doesn't doze; He teaches standing on his toes. His students dassn't doze and does, And that's what teaching is and was.

People respect us, they love us and they're entertained by us, so it's like when you trust somebody on that level, it's a lot easier to speak some real knowledge into their minds.

We’re born alone and we die alone, I accept that. But why, God, do we have to be alone in the middle?

The creative instinct has always been a stronger motive than mere profit to do truly new and revolutionary things.

We just never know. We think we do. We think we have life figured out, and in our arrogance we become hard. But life has a way of humbling us, of softening us.

My whole thing is I like to hang around winners, I like winning spirits, I have zero tolerance for jealousy.