The brain can process two million bits of information per second. It remembers everything you've ever seen, everything you've ever heard.

You don't have to be a brain surgeon to be a valuable person. You become valuable because of the knowledge that you have. And that doesn't mean you won't fail sometimes. The important thing is to keep trying.

I now had enough faith not only to believe there were answer, but to feel certain that those answers would become apparent at some point in the future.

If we make every attempt to increase out knowledge in order to use it for human good, it will make a difference in us and in our world.

I was perhaps the worst student you have ever seen. You know, I thought I was stupid, all my classmates thought I was stupid, so there was general agreement.

This whole concept of boots on the ground, we've got a phobia about boots on the ground. If our military experts say, we need boots on the ground, we should put boots on the ground and recognize that there will be boots on the ground and they'll be over here, and they'll be their boots if we don't get out of there now.

We have the world's best military, even though he (President Barack Obama) has done everything he can to diminish it.