He who refuses to do arithmetic is doomed to talk nonsense.

世界充满了小小的乐趣；诀窍在于发现它们。

在和平时期，儿子埋葬父亲。在战争中，父亲埋葬儿子。

过去不是一个固定的点，而是一个随着每次重述而变化的流动记忆。

We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.

成为英雄的最大障碍是怀疑自己是否会证明自己是个傻瓜；真正的英雄主义是抵抗这种怀疑，而最深刻的智慧是知道何时应该抵抗，何时应该服从。

The only real mistake is the one from which we learn nothing.

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

世界所有的前进动力都归功于不安分的人；幸福的人不可避免地把自己限制在古老的界限内。