Gold and silver, like other commodities, have an intrinsic value, which is not arbitrary, but is dependent on their scarcity, the quantity of labour bestowed in procuring them, and the value of the capital employed in the mines.
黄金和白银，像其他商品一样，具有内在价值，这不是任意的，而是取决于它们的稀缺性、获取它们所耗费的劳动量以及在矿山中使用的资本价值。
The only fence against the world is a thorough knowledge of it.
理解一个角色的唯一方法就是理解他们的矛盾。
心理生活是一个整体，这一普遍说法在某种意义上可以被接受为真实的，即它是一个相互关联的整体。