There is no man, however wise, who has not at some period of his youth said things, or lived in a way the consciousness of which is so unpleasant to him in later life that he would gladly, if he could, expunge it from his memory.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。

数学是科学的女王，而数论是数学的女王。

挑战在于用最少的东西表达最多的内容。

一个好的化学家是“懒惰”的化学家——总是在寻找最简单的方法来完成任务。