My favourite city is Moscow, because of its history, which I find fascinating. As I learned to speak Russian, it made it even more interesting.

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.

You're gorgeous, you old hag, and if I could give you just one gift ever for the rest of your life it would be this. Confidence. It would be the gift of confidence. Either that or a scented candle

Starting the morning without prayer is like starting a car without gas.

Thank you, " she said. "For making me have dinner with you."He laughed. "Next time maybe I'll really torture you and take you to a movie."Next time.

While practicing mindfulness, don't be dominated by the distinction between good and evil, thus creating a battle within oneself.

The best slave is the one who thinks he is free.

The butterfly counts not months but moments And has time enough.

The height of cultivation always runs to simplicity.

A despot doesn't fear eloquent writers preaching freedom- he fears a drunken poet who may crack a joke that will take hold.

Children and zip fasteners do not respond to force ... except occasionally.

You should always be well and bright, for so you do your best work; and you have so much beautiful work to do. The world needs it, and you must give it!