And I went to talk to them about certain of the great tragedies of Western art. I wanted to see how they would seize the bare bones of certain stories, if they came in as a news item at the news desk on a Saturday afternoon.

The first man who， having fenced in a piece of land， said 'This is mine，' and found people naïve enough to believe him， that man was the true founder of civil society.

Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.

The history of a nation is, in essence, the history of its ruling class.

I'm not a perfectionist, but I like to feel that things are done well. More important than that, I feel an endless need to learn, to improve, to evolve.

Sustainability must be profitable, or it won't be sustainable.

The art of education must be to bring the child to the point where he can educate himself.