Freedom does not consist in any dreamt-of independence from natural laws, but in the knowledge of these laws, and in the possibility this gives of systematically making them work towards definite ends.
Friedrich EngelsIf in all ideology men and their circumstances appear upside-down as in a camera obscura, this phenomenon arises just as much from their historical life-process as the inversion of objects on the retina does from the physical life-process.
Friedrich EngelsWhat each individual wills is obstructed by everyone else, and what emerges is something that no one willed.
Friedrich Engels