Landmarks of Scientific Socialism:"Anti-Duehring

“Freedom does not consist in any dream 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. This holds good in relation both to the laws of external nature and to those which govern the bodily and mental existence of men themselves”

— Friedrich Engels

“Actually, each mental image of the world system is and remains limited, objectively by the historical situation and subjectively by its author's physical and mental constitution.””

— Friedrich Engels

“If Hegel had not died long ago, he would hang himself, with all his theologies he could not have thought up this value which has as many different values as it has prices. It requires once more someone with the positive assurance of Herr Dühring to inaugurate a new and deeper foundation for economics with the declaration that there is no difference between price and value except that one is expressed in money and the other is not.””

— Friedrich Engels

“If the world had ever been in a state in which no change whatever was taking place, how could it pass from this state to one of change? The absolutely unchanging, especially when it has been in this state from eternity, cannot possibly get out of such a state by itself and pass over into a state of motion and change. An initial impulse must have therefore come from outside [...] But as everyone knows, the "initial impulse" is only another expression for God.””

— Friedrich Engels

“The idea that political acts, grand performances of state, are decisive in history is as old as written history itself, and is the main reason why so little material has been preserved for us in regard to the really progressive evolution of the peoples which has taken place quietly, in the background, behind these noisy scenes on the stage.””

— Friedrich Engels

“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 Engels

“Слепа необходимость, пока она не сознана. Свобода есть сознание необходимости””

— Friedrich Engels

“From the moment when the bourgeois demand for the abolition of class privileges was put forward, alongside it appeared the proletarian demand for the abolition of the classes themselves. [...] The proletarians took the bourgeoisie at its word: equality must not be merely apparent, must not apply merely to the sphere of the state, but must also be real, must also be extended to the social, economic sphere. [...] Any demand for equality which goes beyond that, of necessity passes into absurdity.””

— Friedrich Engels