Religion is the sigh of the oppressed creature, the heart of a heartless world, and the soul of soulless conditions. It is the opium of the people.

The proletarians have nothing to loose but their chains. They have a world to win.

Society is a sort of organism on the growth of which conscious efforts can exercise little effect.

So far no chemist has ever discovered exchange-value either in a pearl or a diamond.

In bourgeois society capital is independent and has individuality, while the living person is dependent and has no individuality.

In a word, the free trade system hastens the social revolution. It is in this revolutionary sense alone, gentlemen, that I vote in favor of free trade.

The state is based on this contradiction. It is based on the contradiction between public and private life, between universal and particular interests. For this reason, the state must confine itself to formal, negative activities.