耐心是苦涩的，但其果实是甜蜜的。
Patience is bitter， but its fruit is sweet.
The more you do, the more you learn. The more you learn, the more you can do.
我不理会学科的地域界限，我只是抓住我所能抓住的所有大思想。
The world is a comedy to the wise, a tragedy to the foolish.
数学的目标是理解我们观察到的现象背后的结构。
