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.

Courage is exhilarating.

Get out of the way as quickly as you're not needed.

Hate and force cannot be in just a part of the world without having an effect on the rest of it.

There never has been security. No man has ever known what he would meet around the next corner; if life were predictable it would cease to be life, and be without flavor.

...no matter how avid they themselves may be for praise and appreciation, people are often niggardly in giving it to others, however merited it is.

Do something everyday that scares you.