第一个将一块土地围起来并说‘这是我的’，并找到足够简单的人相信他的人，就是文明社会的真正创始人。
The first man who， having enclosed a piece of ground， bethought himself of saying 'This is mine，' and found people simple enough to believe him， was the real founder of civil society.
The beauty of mathematics lies in its ability to reveal hidden symmetries and truths.
人的自由，以及按照自己的意愿行动的自由，是基于他拥有理性，这种理性能够教导他他应该遵循的法律，并使他知道他自己的意愿自由有多远。
The past is not a static thing. It moves and shifts with us.