A question of conscience

I have come to the conclusion that consciousness is limited by physical constraints. I was imagining how my perception would be different if the circumstances of my birth had been different. Would I still exist as I do? Would I still perceive myself? I doubt it- "I' would not exist!! Even the exact same genetics, under different circumstances, would yield a different conscience. Yet would I have a similar conscience? Which led me to wonder, what are the differences between various consciences? Why do "I" feel inside "my" head, but "I" cannot feel the thoughts of others? Why is the concept of "I" limited to one body?

This leads me to conclude consciousness, the sense of "I," is not unique, but pinpointed within the physical restraints. It has locality. It could be argued, perhaps, that conscience is universal, and each "soul" has simply separated from the whole and forgotten of its existence. This is the idea espoused in the book "Conversations with God" byNeale Walsch. However, my explanation for the locality of conscience is that it lives, and dies, with the physical structure known as the brain. In retrospect this seems obvious, yet it has been argued in many philosophies that the soul is eternal and connected to everything else. It seems to me quite the contrary- that the conscience is limited by the locality of its nature.