The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.

I always try to respect my opponents, because they make me better.

变革越彻底，对百姓越有利

人类心智形成和操纵符号的能力使我们区别于其他动物。

Though love seems the fastest of all growths, it is really the slowest. No man or woman knows what perfect love is, until they have been married a quarter of a century.

Our game is to recognize a big idea when it comes along when one doesn't come along very often.