The poor are not irrational; they are just as rational as anyone else, but they operate under very different constraints.
拿古代的情况作标准来看今天的事情，这是对今天不正确的看法；拿今天的情况要求古人，这是不正确的历史观。此言时代不同，社会情况就会不同，因此考察古今，论定古今人物或事件，都不能持相同的标准，而必须结合不同情势具体对待。
"La memoria es un tesoro que debemos cuidar y preservar."
文字是唯一永恒的东西；其他一切都会消亡。
成功是一段旅程，而非终点。继续前进。
The power of mathematics lies in its generality and abstraction.
The deterioration of every government begins with the decay of the principles on which it was founded.