Religious distress is at the same time the expression of the real distress and also the protest against real distress. Religion is the sigh of the oppressed creature, the heart of a heartless world, just as it is the spirit of the spiritless condition. It is the opium of the people.
Karl MarxAnd as for the Jews, who since the emancipation of their sect have everywhere put themselves, at least in the person of their eminent representatives, at the head of the counter-revolution -- what awaits them?
Karl Marx