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.

There's no such thing as useless knowledge. You never know what doors it's going to open up for you.

Why should I give someone else such power over my life?

[Donald Trump] is talked about enormous loss that we've had in this country by allowing radical Islamic extremists to run rampant without having a coherent plan for how to destroy them, not just to contain them, but to destroy them. And the implications of that for all families who are losing service members is significant.

Through the use of books I had the whole world at my feet: could travel anywhere, meet anyone, and do anything.

I think of success as reaching beyond ourselves and helping other people in specific ways.

Happiness doesn't result from what we get, but from what we give.