"Accumulation of wealth at one pole is, therefore, at the same time accumulation of misery, agony of toil, slavery, ignorance, brutality, mental degradation, at the opposite pole."

"The proletariat needs the state, not for freedom, but for the suppression of its opponents."

"The country that is more developed industrially only shows, to the less developed, the image of its own future."

"Has a real taler any existence except in the imagination, if only in the general or rather common imagination of man? Bring paper money into a country where this use of paper is unknown, and everyone …"

"Philosophy stands in the same relation to the study of the actual world as masturbation to sexual love."