Observance of customs and laws can very easily be a cloak for a lie so subtle that our fellow human beings are unable to detect it. It may help us to escape all criticism, we may even be able to deceive ourselves in the belief of our obvious righteousness. But deep down, below the surface of the average man's conscience, he hears a voice whispering, "There is something not right," no matter how much his rightness is supported by public opinion or by the moral code.
对习俗和法律的遵从很容易成为对谎言的掩饰，这种掩饰极为巧妙，令人无法察觉。它可以使我们逃避所有的批评，它甚至能够使我们欺骗自己，令我们相信自己是 显然正当的。但是无论他的正当性得到多少公众舆论或道德准则的支持，在内心深处、在普通人的意识层次之下，他仍听到一个低低的声音：“哪儿有点不正常”。
Fishermen are our foundation; without their hard work, there would be no Chinese fisheries today.
数学的本质在于它的自由。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的：它是关于理解的。
几何学是关于永恒存在的知识。