It does not explain it.
It grasps the material process of private property, the process through which it actually passes, in general and abstract formulae which it then takes as laws. It does not Comprehend these laws -- i.e., it does not show how they arise from the nature of private property. Political economy fails to explain the reason for the division between labor and capital.
For example, when it defines the relation of wages to profit, it takes the interests of the capitalists as the basis of its analysis -- i.e., it assumes what it is supposed to explain. [...]
Similarly, theology explains the origin of evil by the fall of Man -- i.e., it assumes as a fact in the form of history what it should explain.