The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.

多元宇宙不是一个理论，而是某些理论的预测。

时间是人类为了理解宇宙而创造的概念，但宇宙本身是永恒的。