Value the wisdom of humility, as well as the sense of perspective it gives you.

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.

Mom discovered too late that sometimes a hardworking man is more successful than a brilliant one.

Men marched away, Vimes. And men marched back. How glorious the battles would have been that they never had to fight!

Think continally about what you want, not about the things you fear.

A danger foreseen is half avoided.

When we talk about self-confrontations, we are speaking about moral issues rather than social issues.

When the whole world is running towards a cliff, he who is running in the opposite direction appears to have lost his mind.

So sweet and precious is family life.

Light sufferings give us leisure to complain.

I'm very much an admirer of people who are reaching for things and trying to survive.

It is fraud to accept what you cannot repay.