Be flexible, but stick to your principles.

I'm intensely anxious to preserve the freedom that gives you the right to think and to act and to talk as you please. That I think is essential to happiness and the life of the people.

In the long run there is no more exhilarating experience than to determine one's position, state it bravely and then act boldly.

The trouble is that not enough people have come together with the firm determination to live the things which they say they believe.

Do whatever comes your way to do as well as you can. Think as little as possible about yourself. Think as much as possible about other people. Dwell on things that are interesting. Since you get more joy out of giving joy to others, you should put a good deal of thought into the happiness that you are able to give.

Strength that goes wrong is even more dangerous than weakness that goes wrong.

Our obligation to the world is, primarily, our obligation to our own future. Obviously, we cannot develop beyond a certain point unless other nations develop, too.