The natural price of labor is that price which is necessary to enable the laborers, one with another, to subsist and to perpetuate their race, without either increase or diminution.

I write to explore the things that scare me.

再说，义就是匡正的意思，不能以下正上，必须是以上正下。 

真相如同太阳；你可以暂时遮蔽它，但它不会消失。

成功源于专注于解决方案，而不是纠结于问题。

By used books. They have the same words as the new ones. Also libraries.