Plato wrote an allegory called the Cave to explain how we only see reality in extremely limited ways. Most people are blinded by their own ideology, prejudices, emotions and thus are incapable of seeing the world as it truly is. Of course, Plato also believed that for every object or thing that exists, what we see is only an imperfect reflection on the wall of the cave and there is a perfect version somewhere out there in the universe that is the “true” form.
He touched upon a truth that is very profound. Human beings don’t see reality clearly. Many of them are chained in that cave and if you try to explain to them their predicament, they will get angry with you and attack you. But it is important to try to help other people open their eyes and see more clearly. Willful ignorance is the world’s greatest evil and it must be fought.