Cosmic Entanglement, Consciousness & Bodily Existence

Witnessing the last moments of existence of a living being only reminds us that our existence, in this world that we call ours, is transient and fragile. Although we spend most of our days not thinking too much about it, we are bound to face this reality from time to time and ultimately at the time of our death. It is, in fact, both appalling and essential that we avoid such concerns on a daily basis for our existence would be otherwise flooded with angst and sorrow.

However, in these moments when we are faced with the vanishing of life, we sometimes, feel that we can grasp a short preview of what our existence and the universe are all made of. Of course, such realizations could arguably be described as vain attempts at dealing with grief. I like to think that, though pointless, these moments can only help our understanding of the universe or whatever that might have a purpose in it.

Does it seem so far-fetched (which religion or philosophy isn't?) to think that our bodily manifestation is nothing more than a mere puppet remotely controlled by our true self emanating from a different plane of existence through some sort of cosmic entanglement?

Death could be conceptualized as the simple action of severing this cosmic connection, disconnecting our true self from our "puppet". I have such a hard time believing that our material existence is the only reality. There has to be a more transcendent explanation than simply accepting our condition as it is.

How can we believe that either there is nothing else than the creation of our consciousness and its destruction at the end of our life? Or that something magical and/or religious is there to explain it all? Can't we theorize something in between? Why wouldn't there be something linking our physical universe to a spiritual one obeying our yet-to-come understanding of science?

Isn't there something transcendent in all creatures able to ask themselves such questions? And by that reasoning, can we reach some sort of partial conclusion that we, or part of us, can exist in so many different planes of existence that our true essence does not vanish but only evolves through multiple states and connections?