Plato’s Allegory of the Cave, Animated: History’s Greatest Parable Exploring the Nature of Reality

"“Reality,” wrote Philip K. Dick, “is that which, when you stop believing in it, doesn’t go away.” And yet how are we to be sure that what we observe actually is? After all, so much of what we experience as reality is the product of our remarkably flawed perception.
Some 2,400 years earlier, Plato explored this very question in his famous Allegory of the Cave — perhaps history’s most masterful figurative inquiry into the meaning of life and the nature of reality — found in Book VII of his Republic"
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Plato’s Allegory of the Cave, Animated: History’s Greatest Parable Exploring the Nature of Reality – Brain Pickings