有人自认为在做有用的事，却收效甚微；有人看似在做“无用”之功却流芳后世，引为大用。
Men are born ignorant， not stupid； they are made stupid by education.
A mathematician's intuition is as important as rigorous proof.
我不相信好品味。我相信诚实。
The truth is always something that is told, not something that is known.
国君若真的希望人民多而不希望人民减少的话,如果要蓄养姬妾,就不能不节制。
我不惧怕任何人。每个人都是平等的。上帝把我们放在这里的目的是一样的。