Do you know of the phrase "Aham Brahmasmi"? It means "I am Brahman". Mind you, this is not the Brahmin of the caste system, but the Brahman of Oneness. The word-root for Brahmanda, which means Universe.
Brahman, quite literally, is everything. It is where everything comes from. When someone says "Aham Brahmasmi", he actually means that he is everything because he originates from Brahman. Don't confuse Brahman with God. According to religious concepts, God is good while the Devil is bad. Brahman is everything. How can everything be wholly good or wholly bad? It just is. And everything arises from Brahman.
The word "Ahamkar" means arrogance or pride. The ego. Masters say that the Ego is fuelled by things we think, say and do. If the word Ahamkar is split, then you get Aham (which means I am) and Kara, which I suppose would mean "doing". Logically then, Ahamkara arises by what I am doing. And Ahamkar arises from myself.
Karma. The result of all our actions, good and bad. By action it doesn't necessarily mean what you do, but what you think and say as well. So basically, there are consequences for every action you take. And if you have an Ego, then it adds to your laundrypile of results to bear. And Karma arises from my actions.
The Ego is the "I" factor. If the Brahmanda is about everything, then "I" am about myself only. And the only way I can exist is if I am aware of the differences between myself and everything else. But if everything, including myself, IS Brahman, then why have Ego in the first place? It exists because we have been taught "every man for himself". We have to create an identity for ourselves or get sucked into the large mire of being like everything else. That is why we have created an I v/s Everything else situation in our heads.
But if you ARE everything, then where does the boundary line arise? How exactly are you, YOU? What makes you, you? Are you your body? No, that can't be right because you just said "My" body. What is ME, then? Are you your mind? Or your thoughts? Or just your soul? Are you any of these things individually? Possibly not, because one can't exist without the other. It's all these things combined that comprises you. And you are Brahman.
So there really isn't a you and me situation. Everything is a part of everything else. The concept of Maya isn't all that wrong either. We are trained to believe only what we see. Somewhere down the line, conveniently being unable to explain optical illusions or mirages which are blatant examples that everything that we see isn't really there.
Maybe then a Visionary is one who sees things for what they truly are. Or see things as they are not.. because they aren't real. Human beings can perceive up to seven colours - the vibgyor. What about ultra violent and infra red? What about the radiations higher up and lower down? Gamma rays and radio waves? What would happen if our eyes could perceive every bit of those rays? Imagine seeing telephone tower rays penetrating through you every living second. You really wouldn't want that kind of vision, would you? Most of us wouldn't know how to handle it. We wouldn't want it. We would be happy seeing only what we have seen so far and be happy with it, shutting out the incredible larger picture in favour of the comfortable smaller one.
And that's where the boundary lines come up. The larger outside and the smaller I. Is it any wonder that I believe what eye see?
Maybe it's just time for the ego to go. I don't know. I can't see where this is going. And that's very self fulfilling in itself...