History repeats itself, the first as tragedy, then as farce.

Religion is the impotence of the human mind to deal with occurrences it cannot understand.

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

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.

In proportion as the bourgeoisie, i.e., capital, is developed, in the same proportion is the proletariat, the modern working class, developed - a class of labourers, who live only so long as they find work, and who find work only so long as their labour increases capital. These labourers, who must sell themselves piecemeal, are a commodity, like every other article of commerce, and are consequently exposed to all the vicissitudes of competition, to all the fluctuations of the market.

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

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