The best way to learn mathematics is to do mathematics.

任意能让你脱离现实的避风港，都是艺术。

We are all alone, born alone, die alone, and—in spite of True Romance magazines—we shall all someday look back on our lives and see that, in spite of our company, we were alone the whole way.

我们不是从祖先那里继承土地，而是向子孙后代借用土地。

千丈长的大堤，会因为蝼蚁的小洞而溃决