模形式的算术是理解数论更深奥谜团的关键。

The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.

出自《论语·宪问篇》。遇到事情，不去抱怨上天，也不要去责备别人，应当能够扪心自问，好好地反省自己。