The four most dangerous words in investing are: 'this time it's different.'

"Writing is a way of saying to the world, 'I exist, and I have something to say.'"

On the path of science, failure and success are equally important; they are both steps towards truth.

数学研究是具体与抽象之间不断的对话。

解释：所谓把粮食积存在取之不尽的粮仓里，就是要努力从事粮食生产。

穷人需要的不是施舍，而是阶梯。