"A nation cannot be free and at the same time continue to oppress other nations."

"The bourgeoisie has torn away from the family its sentimental veil, and has reduced the family relation to a mere money relation."

"Freedom does not consist in any dreamt-of independence from natural laws, but in the knowledge of these laws, and in the possibility, therefore, of putting them to work purposefully for definite ends."

"The state is not 'abolished', it withers away."

"The proletariat, the lowest stratum of our present society, cannot stir, cannot raise itself up, without the whole superincumbent strata of official society being sprung into the air."