And now, let me give a parable to show how far our nature is enlightened or unenlightened. Imagine human beings living in an underground cave with an opening upward towards the light, which filters into the depths of the cave. Theses human beings have been here since birth, and their legs and necks have been chained so that they cannot move. They can only see what is directly in front of them, since they are prevented by the chains from turning their heads to either side. At a distance above and behind them is a raised path. And if you look closely, you will see a low wall built along the path, like the screen used by marionette players to conceal themselves from the audience while they show their puppets.
The Myth of the Cave-PLATO
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