"Men's ideas are the most direct emanations of their material state."

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

"Capitalist production, therefore, develops technology, and the combining together of various processes into a social whole, only by sapping the original sources of all wealth - the soil and the labourer."

"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."

"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!"

"The oppressed are allowed once every few years to decide which particular representatives of the oppressing class are to represent and repress them."

"Anyone who knows anything of history knows that great social changes are impossible without feminine upheaval. Social progress can be measured exactly by the social position of the fair sex, the ugly ones included."

"On a level plain, simple mounds look like hills; and the insipid flatness of our present bourgeoisie is to be measured by the altitude of its great intellects."

"Medicine heals doubts as well as diseases."

"Social progress can be measured by the social position of the female sex."

"Democracy is the road to socialism."

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

"Machines were, it may be said, the weapon employed by the capitalists to quell the revolt of specialized labor."

"Nothing can have value without being an object of utility."

"The theory of Communism may be summed up in one sentence: Abolish all private property."

"Experience praises the most happy the one who made the most people happy."

"For the bureaucrat, the world is a mere object to be manipulated by him."

"Capital is money, capital is commodities. By virtue of it being value, it has acquired the occult ability to add value to itself. It brings forth living offspring, or, at the least, lays golden eggs."

"Necessity is blind until it becomes conscious. Freedom is the consciousness of necessity."

"The history of all previous societies has been the history of class struggles."

"The ruling ideas of each age have ever been the ideas of its ruling class."

"Society does not consist of individuals but expresses the sum of interrelations, the relations within which these individuals stand."

"It is not history which uses men as a means of achieving - as if it were an individual person - its own ends. History is nothing but the activity of men in pursuit of their ends."

"A specter is haunting Europe - the specter of communism."

"We should not say that one man's hour is worth another man's hour, but rather that one man during an hour is worth just as much as another man during an hour. Time is everything, man is nothing: he is at the most time's carcass."

"Without doubt, machinery has greatly increased the number of well-to-do idlers."

"History repeats itself, first as tragedy, second as farce."

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

"A commodity appears at first sight an extremely obvious, trivial thing. But its analysis brings out that it is a very strange thing, abounding in metaphysical subtleties and theological niceties."

"There is a specter haunting Europe, the specter of Communism."

"Capital is reckless of the health or length of life of the laborer, unless under compulsion from society."

"The development of civilization and industry in general has always shown itself so active in the destruction of forests that everything that has been done for their conservation and production is completely insignificant in comparison."

"The ideas of the ruling class are in every epoch the ruling ideas, i.e., the class which is the ruling material force of society, is at the same time its ruling intellectual force."

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

"The production of too many useful things results in too many useless people."

"The country that is more developed industrially only shows, to the less developed, the image of its own future."

"The only antidote to mental suffering is physical pain."

"Religion is the opium of the masses."

"The meaning of peace is the absence of opposition to socialism."

"It is absolutely impossible to transcend the laws of nature. What can change in historically different circumstances is only the form in which these laws expose themselves."

"The rich will do anything for the poor but get off their backs."

"Revolutions are the locomotives of history."

"Landlords, like all other men, love to reap where they never sowed."

"Natural science will in time incorporate into itself the science of man, just as the science of man will incorporate into itself natural science: there will be one science."

"History does nothing; it does not possess immense riches, it does not fight battles. It is men, real, living, who do all this."

"In a higher phase of communist society... only then can the narrow horizon of bourgeois right be fully left behind and society inscribe on its banners: from each according to his ability, to each according to his needs."

"The first requisite for the happiness of the people is the abolition of religion."

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

"The worker of the world has nothing to lose, but their chains, workers of the world unite."

"Greek philosophy seems to have met with something with which a good tragedy is not supposed to meet, namely, a dull ending."