I reckon he is talking about our mind, shadow represents our false self, and your ego is constructed on who think you are not what you are, and i believe he is talking about how our mind thinks and can create a false illusion between you and others, to not think is to be, when you realise your mind is not who you are, to not think is to be conscious but 99 percent of our population live unconsciously, because we have been classically conditioned by society to live and work they way we do
That part of us that wants to be more restricted by the voice that says we cant.. Our minds have been an experiment since were born and indoctrinated by the public education system .. Listen Repeat .. follow.. Obey.. the chains were created early in our lives