The ideas of economists and political philosophers， both when they are right and when they are wrong， are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men， who believe themselves to be quite exempt from any intellectual influence， are usually the slaves of some defunct economist.

你的生活质量就是你的人际关系的质量。

合作是解开宇宙之谜的关键。

爱是非理性的。你越爱一个人，就越觉得一切都没有意义。

The historian is a prophet looking backwards.