The consciousness and sentience of what is “me”, most likely emerges from the structure and the biochemical activity of the brain.
A dead brain means no consciousness and no sentience.
Why do I make this inference? There are many case studies of people with different types of brain damage that affect parts of their conscious experience—it could be an inability to recognise faces, an inability to store short-term or long-term memories.
Split brain operations literally result in two apparent consciousnesses within the same person, with the two brain-halves disagreeing over any number of things.
With “Blindsight”—the person literally does not consciously perceive what he sees.
The ability to think, feel, and to have emotions—all associated with different parts of the brain, and all can be lost with brain damage. And there’s no greater brain damage than a completely dead brain.
There are other issues I take with the Christian theology. At what point in our evolutionary past did humans become human enough to merit an immortal consciousness that can survive brain death? Presumably you don’t think all life on the planet has the same privilege—your potted plant isn’t going to meet you in heaven, for example, yet all life on Earth is related and shares ancestry.
It seems to me that an individual human life is but a short blip of consciousness, when some atoms created by the universe are rearranged in such a manner that they can look back at the universe—and then entropy disorders those atoms again.
I think it sucks. Personally, I’d like to live forever—but I won’t. To deal with this existential terror, we make up comforting illusions and delusions. We pretend to find “meaning” in various things. Some invent or cling to religion. There’s a theory that pretty much the whole of human culture is motivated by a fear of death, and is a way of immortalising ourselves beyond physical death.
If you have no shadow of a doubt that your consciousness will survive physical death, and then somehow reside in a heaven for all eternity—I genuinely envy you. It must be very reassuring to be so comfortable with death. I’m not sure it’s a good attitude or belief when taken collectively—if our physical lives are going to be superceded by immortality in heavenly paradise, then what’s the point of life on Earth? It cheapens life and makes it relatively meaningless by comparison.
But, good luck to you anyway.