和平不是战争的缺席，而是建立在性格坚强的美德之上。
Peace is not the absence of war， but a virtue based on strength of character.
世界是一个残酷的地方，艺术是它的复仇。
Mathematics is the art of giving the same name to different things.
我们每个人都不如我们所有人聪明。
States are rational actors that seek to maximize their power and security in an anarchic international system.