Urk! Be careful! Onacruse is going DEEEEEP again!
Devil's advocate, here. Consciousness could be an illusion supported by our neural network. We just FEEL eternal, because consciousness is as natural to us as breathing.
Watching my beloved cat pass away, I was struck by the dramatic difference between dead flesh and living flesh. Living, Jesse's body pulsed, breathed, pinked, held itself together. Very quickly after he passed away, everything inside collapsed, and he started leaking. It is astounding, really, that living creatures hold themselves together as little bits of communal cells, all supporting each other. And how quickly that can all fall apart.