The philosophers have only interpreted the world, in various ways; the point, however, is to change it.
Die Philosophen haben die Welt nur verschieden interpretiert; es kommt aber darauf an, sie zu verandern.

Philosophers
Karl Marx
Born in 1818 in Trier, Prussia, Karl Marx inverted Hegelian dialectics into materialism and constructed historical materialism, locating the driving force of history in economic relations of production. With Engels he authored The Communist Manifesto, presenting the theory of class struggle, and in his life's work Das Kapital he dissected the structural contradictions of capitalism through the concept of surplus value. His analytical methods transformed the methodology of social science as a whole.
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Karl Marx's Other Quotes
Capital is dead labour, that, vampire-like, only lives by sucking living labour, and lives the more, the more labour it sucks.
The history of all hitherto existing society is the history of class struggles.
Religion is the sigh of the oppressed creature, the heart of a heartless world, and the soul of soulless conditions. It is the opium of the people.
Workers of all lands, unite!
Being determines consciousness.
Related Quotes
The most dangerous phrase in the language is: 'We've always done it this way.'
-- Grace Hopper
Act as if what you do makes a difference. It does.
-- William James
Think on the shop floor; act on the shop floor.
-- Sakichi Toyoda
Waste no more time arguing about what a good man should be. Be one.
-- Marcus Aurelius
You don't learn to walk by following rules. You learn by doing, and by falling over.
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It is hard to retain what you learn unless you practice it.
-- Seneca