你唯一应该试图超越的人就是昨天的自己。

"The most important thing in empirical work is to be clear about the question you are trying to answer."

哲学的任务不是去发现什么是真实的，而是去理解我们已经知道的东西。

Believe that life is worth living， and your belief will help create the fact.

The natural effort of every individual to better his own condition， when suffered to exert itself with freedom and security， is so powerful a principle that it is alone， and without any assistance， not only capable of carrying on the society to wealth and prosperity but of surmounting a hundred impertinent obstructions with which the folly of human laws too often encumbers its operations.