The moment you start to think about what you're going to do if you lose, you have lost.

The secret of being miserable is to have leisure to bother about whether you are happy or not.

The journey of solving a mathematical problem is as important as the solution itself, for it teaches us patience, persistence, and the joy of discovery.

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.

You have to believe in yourself when no one else does.

在年轻的时候，请接受能为自己提供陡峭的学习曲线和艰苦的磨炼机会的工作。最初的工作是为人生打基础的，不要为了暂时的声望而轻易地接受一份工作。

Good is indefinable.