历史是时间写在人类记忆上的一首循环诗。
History is a cyclic poem written by time upon the memories of man.
The key to a great performance is listening. It's not just about delivering your lines, but really hearing what the other actors are saying and responding truthfully.
The house is a small city, the city is a large house.
——回答清华学生“国民党施行的，是否俄国的主义？”，1924年2月9日
States are rational actors that seek to maximize their power and security in an anarchic international system.
学校是用来培养人才的，但古代圣王的用意不仅如此，还希望治理天下的方法都出自学校
我不和别人竞争，我和自己竞争。