Religion is the opium of the people translated from the German Die Religion ... ist das Opium des Volkessometimes misquoted as opiate of the people.
Karl MarxThere are, besides, eternal truths, such as Freedom, , etc., that are common to all states of society. But Communism abolishes eternal truths, it abolishes all religion, and all morality, instead of constituting them on a new basis; it therefore acts in contradiction to all past historical experience.
Karl MarxIn place of the old bourgeois society, with its classes and class antagonisms, we shall have an association in which the free development of each is the condition for the free development of all.
Karl Marx