We now see into what extraordinary mistakes and contradictions the popular school has fallen in making material wealth or value of exchange the sole object of its investigations, and by regarding mere bodily labour as the sole productive power.

• 流行学派把物质财富或交换价值作为研究的唯一对象，把单纯的体力劳动认为是唯一的生产力；我们现在可以看到这个学派在这一点上陷入了多大的错误和矛盾。