Religion is the opiate of the people.

In every revolution there intrude, at the side of its true agents, men of a different stamp; some of them survivors of and devotees to past revolutions, without insight into the present movement, but preserving popular influence by their known honesty and courage, or by the sheer force of tradition; others mere brawlers, who, by dint of repeating year after year the same set of stereotyped declamations against the government of the day, have sneaked into the reputation of revolutionists of the first water They are an unavoidable evil: with time they are shaken off.

Under no pretext should arms and ammunition be surrendered; any attempt to disarm the workers must be frustrated, by force if necessary.

The burgeoisie, by the rapid improvement of all instruments of production, by the immensely facilitated means of communication, draws all nations into civilization.

If the labourer consumes his disposable time for himself, he robs the capitalist.

The Communists have no need to introduce free love; it has existed almost from time immemorial.

I am a machine, condemned to devour them and then, throw them, in a changed form, on the dunghill of history.