最好的数学是你第一眼看不明白的数学。

Man is not logical and his intellectual history is a record of mental reserves and compromises. He hangs on to what he can in his old beliefs even when he is compelled to surrender their logical basis.

质量不是一种工具，而是一种心态。

敲响那些还能敲响的钟，忘记你那完美的祭品。万物皆有裂痕，那是光照进来的地方。