I want to know: How does a space suit on Mars work? Show me how it is pressurized, and how it is cooled. What's the glove design? None of that stuff can be bought off the rack. It does not exist. You can't just go to SpaceMart and buy those things.

No one ever accomplished anything great sitting down.

Doing a space walk. It is one of the most rare human experiences. To leave your spaceship and go outside, so that you are alone in the universe with Earth distant and the universe around you. That is amazing.

Don`t let life randomly kick you into the adult you don`t want to become

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.

Early success is a terrible teacher. You're essentially being rewarded for a lack of preparation, so when you find yourself in a situation where you must prepare, you can't do it. You don't know how.

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.