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!

Scientific truth is always paradox, if judged by everyday experience, which catches only the delusive appearance of things.

The Communists disdain to conceal their views and aims. They open declare that their ends can be attained only by the forcible overthrow of all existing social conditions. Let the ruling classes tremble at a Communistic revolution. The proletarians have nothing to lose but their chains. They have a world to win. WORKING MEN OF ALL COUNTRIES, UNITE!

Capital is dead labor, which, vampire-like, lives only by sucking living labor, and lives the more, the more labor it sucks.

...the realm of freedom does not commence until the point is passed where labor under the compulsion of necessity and of external utility is required.

The way people get their living determines their social outlook.

History does nothing, possesses no enormous wealth, fights no battles. It is rather man, the real, living man, who does everything, possesses, fights. It is not History, as if she were a person apart, who uses men as a means to work out her purposes, but history itself is nothing but the activity of men pursuing their purposes.