有两种东西是无限的，宇宙和人类的愚蠢。

I don’t like to lose—at anything—yet I’ve grown most not from victories, but setbacks.

Diversification is the only free lunch in finance.

Small changes can have big effects when they help people break out of the poverty trap.

理解的提高有两个目标：首先，我们自己的知识增长；其次，使我们能够将这些知识传递给他人。

数学的本质在于其自由性。