成功不是幸福的关键。幸福才是成功的关键。如果你热爱你所做的事，你就会成功。

能源的未来在于多样化和适应性。

Foreign policy should not be confused with missionary work.

I met the towering intellectuals in books, not in classroom, which is natural.My family was into all that stuff, getting ahead through discipline, knowledge, and self-control.

宇宙是可以理解的，因为它受我们能够理解的法则支配。

可信因果推断的关键不仅是方法，还有方法与当前问题的契合度。