不学《诗经》，就无法表达自己的意思；不学习《礼记》，就无法在社会中立足。

世界是一切事实的总和。

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

Ignoring isn’t the same as ignorance, you have to work at it.

在科学中最令人兴奋的短语，预示着新发现的，不是“我找到了！”而是“这有点奇怪……”

集合是一个允许自己被看作一的多个。