As I was reading the posts, I began equating the 'shadow' with the human spirit / our human nature. If this is true, I wondered if you recognize a human nature / spirit entity within your being?
Yes, there is such a thing as human nature and a human spirit, although not a spirit entity separate from the human. I suspect I also define spirit quite differently from you. Human nature as I see it is a highly evolved social nature that is altruistic and puts the welfare of the family and the tribe however that is defined above all else including self except as self contributes to the welfare of family and tribe.
This is both the good news and the bad news. If the welfare of the tribe is corrupted by a powerful leader or mediator for God, Hell awaits the whole tribe. This is not the fault of a sinful human nature, it it the result of the failure of the leaders to accept the responsibility for their actions on behalf of the tribe. Please note this is a failure of the leader to comply with herm human nature, not the human nature driving the failure.
The human spirit is the reward mechanism built into the mind/brain to provide the incentive to do more than our share for ourselves, our family, and our tribe, using tribe in the larger sense of those that are important to us in the world. In a modern world the tribe may be distributed over a whole country or even the whole world. It may contain members we will never meet, but whose activities contribute to our own spiritual development and whom we may perchance affect with our own activities for the welfare of the tribe."