人生应为生而食，不应为食而生。

我的观察是每当某个任务一个人就可以完成… 两个人就会做得更差，三个或更多人时则几乎没什么行动。

Critical comments by students should be taken in a friendly spirit， accumulation of material should not stifle the student’s independence.

The best way to invest is to look at what's happening in the real world and invest accordingly.

教育是保护的基础——人们保护他们所理解的东西。