国君若真的希望人口多而不希望人口少的话,如果要蓄养姬妾,就不能不节制。[说明∶老百姓也得有老婆生孩子,别抢人家的老婆] 
过去总是存在于现在,以我们并不总是理解的方式塑造着我们。
The essence of liberty is the ability to pursue one’s own goals without arbitrary interference from others.
我不想只在球场上成为冠军,我想在生活中也成为冠军。
In science, the most exciting phrase to hear is not 'Eureka!' but 'That's funny...'
每一个数学问题都是一个等待解决的谜题,每一个解答都是向理解现实结构迈进的一步。
The best way of learning about anything is by doing.