Workers of the world unite; you have nothing to lose but your chains.

Philosophy is to science as masturbation is to sex.

With disdain I will throw my gauntlet full in the fact of the world and see the collapse of this pygmy giant. Then will I wander god-like and victorious through the ruins of the world. And giving my words an active force, I will feel equal to the Creator.

Wages are determined by the bitter struggle between capitalist and worker.

In a higher phase of communist society... only then can the narrow horizon of bourgeois right be fully left behind and society inscribe on its banners: from each according to his ability, to each according to his needs.

All freed, fast-frozen relations, with their train of ancient and venerable prejudices and opinions, are swept away, all new-formed ones become antiquated before they can ossify. All that is solid melts into air, all that is holy is profaned, and man is at last compelled to face with sober senses, his real conditions of life, and his relations with his kind.

If we have chosen the position in life in which we can most of all work for mankind, no burdens can bow us down, because they are sacrifices for the benefit of all; then we shall experience no petty, limited, selfish joy, but our happiness will belong to millions, our deeds will live on quietly but perpetually at work, and over our ashes will be shed the hot tears of noble people.