"The price of greatness is responsibility."

最好的故事是那些让你感觉活着的故事。

Your most unhappy customers are your greatest source of learning.

As to the gods, I do not know whether they exist or not, nor what they are like in form; for there are many things that hinder sure knowledge, the obscurity of the matter and the shortness of human life.

真相很少是纯粹的，也从来不是简单的。

安全困境是国际政治的一个基本特征，因为国家增加自身安全的努力往往会降低其他国家的安全。