“Let the ruling classes tremble at a communist revolution. The proletarians have nothing to lose but their chains. They have a world to win. Workingmen of all countries, unite!”

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

“Reason has always existed, but not always in a reasonable form.”

“Modern bourgeois society with its relations of production, of exchange, and of property, a society that has conjured up such gigantic means of production and of exchange, is like the sorcere...”