Mathematics teaches us to think logically and to approach problems systematically.

三种激情，简单但无比强烈，支配着我的生活：对爱的渴望，对知识的追求，以及对人类苦难的无法忍受的怜悯。

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

Leadership means making tough decisions today that will benefit the company tomorrow.

The great cause of the prosperity of the country is liberty—liberty in the economic system.