Karl Marx

"The printing press is a revolutionary force that challenges authority."

"Criticism must be relentless, and must not fear its own conclusions."

"Society as a whole is split into hostile classes that perpetually struggle against each other."

"The less you eat, drink and buy books; the less you go to the theatre or to balls; the less you drink and smoke, but the more you save, the greater becomes your treasure that no thief can rob."

"A spectre is haunting Europe—the spectre of communism."

"The materialist conception of history starts from the principle that production is the basis of all history."

"Everything that is not forbidden is permitted in the realm of ideas."

"The workers have a world to win and nothing to lose but their chains."

"Accumulation of capital means accumulation of human labour."

"The development of industry inevitably produces new class divisions."

"Love in its social form is a product of economic conditions."

"Science is a form of consciousness that reflects material reality."

"The national narrow-mindedness and indifference must disappear."

"All history is the history of class struggle."

"The dialectic of history moves through thesis, antithesis and synthesis."

"Religion is the illusion that gives people false hope for happiness."

"The rate of profit tends to fall as capitalism matures."

"Culture is determined by economic base and power relations."

"The worker becomes all the poorer the more wealth he produces."

"In revolutionary times, even the most conservative can be swept into radical change."

"The struggle between labour and capital is the fundamental motor of history."

"Machinery is not opposed to labour, but only to labour for capital."

"National differences and antagonisms between peoples are daily more and more vanishing."

"The true foundation of theology is ignorance of natural causes."

"Man can create nothing without nature and natural resources."

"Education is the most powerful weapon which you can use to change the world."

"The struggle for individual rights is fundamentally a struggle for economic equality."

"History is not a conscious agent making choices; it is driven by material conditions."

"Art reflects the economic conditions and contradictions of its time."

"The goal of the working class is the abolition of classes altogether."