生活中唯一的出路就是笑着度过。你要么笑，要么哭。我更喜欢笑。哭会让我头疼。

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

To try to write love is to confront the muck of language: that region of hysteria where language is both too much and too little, excessive and impoverished.