最终，我们都是故事。重要的是我们如何讲述它们。

The very least you can do in your life is to figure out what you hope for. And the most you can do is live inside that hope. Not admire it from a distance but live right in it, under its roof.

The beauty of mathematics is that it is one of the few areas of human endeavor where absolute truth can be known.

文明的真正考验不是人口普查，不是城市的规模，也不是庄稼的产量——而是这个国家培养出什么样的人。