If you love what you do, you'll be your best at it compared to anything else you might have chosen as a career. Or at least you will love it more, and you won't lead a depressed day of your life.

There is no greater education than one that is self-driven.

I believe that the manned space program can engage the public by advancing the space frontier. Every next mission takes you farther out in space than you were before, either technologically or in terms of distance.

The school system is constructed to praise you if you get high grades. And if you get straight A's, you're the one that everyone puts forward, and they prognosticate that the straight-A person is the one most likely to succeed, because that's the way the school system is constructed and conceived.

Not only are we in the universe, the universe is in us. I don't know of any deeper spiritual feeling than what that brings upon me.

I recognize that there's an appetite that I'm now serving, and I'm happy to do so. I think it means quite a bit that science has achieved this level of public interest and access. And so I'm simultaneously astonished every day upon recognizing this, and I think it's a good sign for the country and possibly for the world.

When you are a hammer, all of your problems will look like nails to you.