“The need of a constantly expanding market for its products chases the bourgeoisie over the entire surface of the globe.”

“The human being is in the most literal sense a political animal, not merely a gregarious animal, but an animal which can individuate itself only in the midst of society.”

“The most interesting acquaintanceship I have struck up here is that of Colonel Lapinski. He is without doubt the cleverest Pole - besides being an homme d'action [man of action] - that I have ever met. His sympathies are all on the German side, though in manners and speech he is also a Frenchman. He cares nothing for the struggle of nationalities and only knows the racial struggle. He hates all Orientals, among whom he numbers Russians Turks, Greeks, Armenians, etc., with equal impartiality.... His aim now is to raise a German legion in London.”

“He who before was the money owner, now strides in front as capitalist; the possessor of labor-power follows as his laborer. The one with an air of importance, smirking, intent on business; the other hesitant, like one who is bringing his own hide to market and has nothing to expect but a hiding.”

“Philosophy is to science as masturbation is to sex.”

“Ideas are the very coinage of your brain.”

“It has come to be practically a sort of rule in literature that a man, having once shown himself capable of original writing, is entitled thenceforth to steal from the writings of others at discretion.”

“We are the prisoners of ideas.”