了解心灵的方法是对其进行逆向工程:弄清楚自然选择设计它来完成什么任务。
The circumstances of the world are continually changing, and the opinions of man change also; and as government is for the living, and not for the dead, it is the living only that has any right in it.
学习某事的最好方法就是去教它。
Money is concerned only with what is common to all, i.e., the exchange value, and it reduces all quality and individuality to the question: How much?