My favourite city for nightlife is Toronto, as it has such a multicultural feel, with so many different restaurants and theatres.

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.

Take a vacation from your stressful thoughts by changing your thoughts.

When we lose our innocence - when we start feeling the weight of the atmosphere and learn that there's death in the pot - we take leave of our sense.

Ladies' hearts are like china on a mantelpiece. There are so many of them, and it is so easy to break them without noticing.

Americans are going to see that as the more religious a Muslim is, the more likely they're going to end up somehow fighting for ISIS' cause.

It pays to trust your instinct.

There is no jollitie but hath a smack of folly. [There is no jollity but hath a smack of folly.]

Traveling and other cultures provide me with great inspiration, especially unusual people and cultures totally unlike my own. They generate many new ideas for me.

God isn't offended by your biggest dreams or boldest prayers. He is offended by anything less. If your prayers aren't impossible to you, they are insulting to God.

It is normal for husband and wife to argue: it's normal. It always happens. But my advice is this: never let the day end without having first made peace. Never!

Sometimes you have to disclaim your country and inhabit another before you can return to your own.