The ideas of economists and political philosophers， both when they are right and when they are wrong， are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men， who believe themselves to be quite exempt from any intellectual influence， are usually the slaves of some defunct economist.

Collaboration, not competition, will save our forests.

I don't think about age. I think about life and living.

I always had a personality that was a little bit different.

唯一的失败是不去尝试。