The first principle is that you must not fool yourself—and you are the easiest person to fool. So you have to be very careful about that. After you've not fooled yourself, it's easy not to fool other scientists. You just have to be honest in a conventional way after that.

War may sometimes be a necessary evil. But no matter how necessary, it is always an evil, never a good. We will not learn how to live together in peace by killing each other's children.

Tear down walls of ignorance and narrow-mindedness, for nothing has to stay as it is.

Taking action means saying 'no' to indifference. If there is a war to be waged, it is the war against the indifference which is eating away at our societies.

Over the past two centuries, our nation has moved from being an agricultural economy, to a manufacturing economy, to a service economy, and now to a predominantly financial economy. But our financial economy, by definition, subtracts from the value created by our productive businesses. Think about it: while the owners of business enjoy the dividend yields and earnings growth that our capitalistic system creates, those who play in the financial markets capture those investment gains only after the costs of financial intermediation are deducted. Thus, while investing in American business is a winner's game, beating the stock market before those costs is a zero-sum game. But after intermediation costs are deducted, beating the market—for all of us as a group—becomes a loser's game.