They don't know it, but they are doing it.

Greek philosophy seems to have met with something with which a good tragedy is not supposed to meet, namely, a dull ending.

Misery motivates, not utopia.

The English have all the material requisites for the revolution. What they lack is the spirit of generalization and revolutionary ardour.

The product of mental labor - science - always stands far below its value, because the labor-time necessary to reproduce it has no relation at all to the labor-time required for its original production.

As, in religion, man is governed by the products of his own brain, so in capitalistic production, he is governed by the products of his own hand.

The Communists have no need to introduce free love; it has existed almost from time immemorial.