A human being is a part of the whole called by us universe, a part limited in time and space. He experiences himself, his thoughts and feeling as something separated from the rest, a kind of optical delusion of his consciousness. This delusion is a kind of prison for us, restricting us to our personal desires and to affection for a few persons nearest to us. Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty.
From my recollection of 19th century German philosophical fascination for Vedic religions there’s what was called a Mayan veil of illusion. This is actually an interesting perspective on perspective. From a more modern stance we don’t experience reality in the raw, but it is simulated or mediated for us in our brain.
The notion of umwelt has some overlap: [en.m.wikipedia.org]
We can free ourselves by communicating with others who share the same neural architecture and cultural upbringing. The scientific method is one of the best means of freeing ourselves from Plato’s cave. Otherwise we may get stuck inside a lonely solipsistic prison.