数学是上帝用来书写宇宙的语言。

Language is a skin: I rub my language against the other. It is as if I had words instead of fingers, or fingers at the tips of my words.

很多高明人士经常耸人听闻地声称的所谓“真实世界的复杂性”实际上不过是他们自己脑子里的自相矛盾。

君主是臣子的纲常，父亲是儿子的纲常，丈夫是妻子的纲常。