Karl Marx

"Forced labour is the only form of labour that produces surplus value."

"The modern bourgeois is a product of a long course of development."

"Human nature is not something given once and for all, but constantly develops."

"Economic relations set the tone for all other human relations."

"The state is nothing more than a machine for the suppression of one class by another."

"In the factory of the future, machines will do all the work while humans enjoy leisure."

"A man is rich in proportion to the number of things he can afford to let alone."

"The education of the working class is the secret weapon of their emancipation."

"Private property is the result of alienated labour."

"The consciousness of man is determined by his social being."

"Without revolutionary theory, there can be no revolutionary movement."

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

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

"Man's consciousness is determined by the social and economic conditions he lives in."

"Communism can only be achieved through the violent overthrow of all existing conditions."

"The more civilized man becomes, the more he struggles against nature."

"Work under capitalism is alienating and dehumanizing by its very nature."

"The free development of each is the condition for the free development of all."

"Philosophers have only interpreted the world in various ways; the real task is to change it."

"The writer must earn money in order to live and write, but he must not live and write in order to earn money."

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

"The basis of religious criticism is: Man makes religion, religion does not make man."

"Capital accumulation is the foundation of modern society."

"In a higher phase of communist society, labour will cease to be a means of survival."

"The proletariat has nothing to lose but its chains."

"All previous historical movements were movements of minorities for minorities."

"The bourgeoisie produce their own gravediggers; its fall and the victory of the proletariat are equally inevitable."

"Man is distinguished from other animals by his capacity to produce his own means of subsistence."

"The mode of production of material life conditions the general process of social, political and intellectual life."

"Craft, science and consciousness are determined by the social and economic base."