The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.

你无法改变周围的人，但你可以选择与谁为伍。

The structure of the international system, not the intentions of individual states, is the primary determinant of state behavior.

Every time a coal plant closes, a piece of America's heart closes with it.

Life is about creating yourself.

任何真正新颖的东西都是在一个人的青年时期发明发现出来的，当一个人变得更有经验，更有名，也更顽固。