You know — one loves the sunset， when one is so sad.

现在是过去的钥匙，但过去也可能掌握着未来的钥匙。

The poor are not irrational; they are just as rational as anyone else, but they operate under very different constraints.

The universe is not only queerer than we suppose, but queerer than we can suppose.

同行很少聚在一起，即使是为了娱乐，谈话最终都会以反对公众的阴谋或提高价格的某种策划而结束。

数学的语言是普遍的，超越了文化和语言的障碍。