人类心智是一套信息处理机器，由自然选择设计来解决我们狩猎采集祖先面临的适应性问题。

我不是市场计时者。我是价值投资者。

The use of a program to prove the 4-color theorem will not change mathematics - it merely demonstrates that the theorem, a challenge for a century, is probably not important to mathematics.

"Some infinities are bigger than other infinities."

"Science is the highest personification of the nation because that nation will remain the first which carries the furthest the works of thought and intelligence."

——〈上李鸿章书〉，1894年1月

Bad things can happen fast， but almost all good things happen slowly.

"A book is a gift you can open again and again."