钢铁的强度只与制造它的人的强度相匹配。

寻找意义是一种徒劳的努力。

生活中的唯一限制是你为自己设定的限制。

When we are planning for posterity， we ought to remember that virtue is not hereditary.

数学是理性的音乐。

文学毫无用处，正因如此它不可或缺。

The word was my country, and of that I was deprived.

You can't have a better tomorrow if you're still thinking about yesterday.

数学之美在于它能够揭示看似复杂事物背后的简单性。