The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

"I want to write books that make children think and feel."

I believe in the power of love and kindness.

We are all born mad. Some remain so.

My garden is my most beautiful masterpiece.

The best architecture is the one that feels inevitable.

True happiness arises, in the first place, from the enjoyment of one's self, and in the next, from the friendship and conversation of a few select companions.

The conversation about coal must move beyond 'pro' or 'anti'—we need solutions, not slogans.