如果你的工艺危害环境，那你不是在鞣制，而是在掠夺。

最好带着信心行动，无论你有多少的权利。

——在逆境中始终百折不挠，1913年

The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when to be obeyed.

Although chips are small, they are the food of modern industry and cannot be controlled by others.

有才能而性情舒缓的人一定是大人才；有智慧而心气平和的人方称之大智慧。

Love doesn't just sit there, like a stone; it has to be made, like bread, remade all the time, made new.

In mathematics, the simplest questions often lead to the most profound discoveries.