It is a curiosity of human nature that lack of self-assurance seems to breed an exaggerated sense of power and mission.

Educational exchange can turn nations into people, contributing as no other form of communication can to the humanizing of international relations

We must dare to think 'unthinkable' thoughts. We must learn to explore all the options and possibilities that confront us in a complex and rapidly changing world.

In the long course of history, having people who understand your thought is much greater security than another submarine.

The Program further aims to make the benefits of American culture and technology available to the world and to enrich American life by exposing it to the science and art of many societies.

In a democracy dissent is an act of faith. Like medicine, the test of its value is not in its taste, but in its effects.

The price of empire is America's soul, and that price is too high.

"The making of peace is a continuing process that must go on from day to day, from year to year, so long as our civilization shall last."

Law is the essential foundation of stability and order both within societies and in international relations.

We must care to think about the unthinkable things, because when things become unthinkable, thinking stops and action becomes mindless.

In a democracy, dissent is an act of faith.

Sometimes what we don't wish for is more powerful than what we do.

Only when every one of us and every nation learns the secret of love for all mankind will the world become a great orchestra, following the beat of the Greatest Conductor of all.

I don't think you ever know in yourself whether you have gone mad. You exist in a bubble. There comes a point where you suddenly feel not really a part of the world, you're just passing through.

The people we have employed in an undertaking that has turned out badly should be doubly rewarded.

The one thing you don't want to be is a sucky clean comic. I hate sucky clean comics! It's like Christian rock, bro. I'd rather listen to gospel and Christian rock. That's cheating!

I never wanted to be on any billionaires list. I never define myself by net worth. I always try to define myself by my values.

I grew up in LA. I sort of watched the Raiders play and that sort of thing.

When I was young, I thought I was a god. Now, I just basically work on staying humble. My priorities changed. Just to be able to try to change them - that was frightening to me.

There's no denying the public's appetite for cosmic discovery.

Every door opens to something and it is better to go toward that something than to sit staring at the blank wall of time.