I am nothing but I must be everything.

Religion is the opiate of the people.

It is absolutely impossible to transcend the laws of nature. What can change in historically different circumstances is only the form in which these laws expose themselves.

Men make their own history, but they do not make it just as they please; they do not make it under circumstances chosen by themselves, but under circumstances directly encountered, given and transmitted from the past. The tradition of all the dead generations weighs like a nightmare on the brain of the living.

To be radical is to grasp things by the root.

Men's ideas are the most direct emanations of their material state.