It reminds me of a story about three brothers chained up in a cave. They have lived there their whole lives. Behind them was the opening of the cave that light would shine through. On the wall they'd see shadows of what passed by and give them names. Then one day, one of the three brothers was released. He left the cave and learned the truth about the nature of the shadows. Full of knowledge he returned to his brothers and told them all the wonderful things he saw. But they refused to believe him, they said his eyes had been poisoned. So the brother left knowing his brothers would never face the truth.