"The worker has nothing to lose but his chains. He has a world to win."

"If you want to be consistent in your aesthetic criticism, then forbid also a too serious and too modest investigation of the truth, for too great seriousness is the most ludicrous thing of all, and to…"

"The worker has an interest in maintaining his existence as a worker, but not in maintaining his existence as a commodity."

"The theory of the Communists may be summed up in the single sentence: Abolition of private property."

"The advance of capitalist production develops a working class, which by education, tradition, and habit, looks upon the requirements of that mode of production as self-evident natural laws."