So much of metaphysics comes down to attempting to mediate your gut feeling about the reality of the world versus the reality of you in the light of your imminent death. As if the world expresses its own 'cogito' as if you were its thought, or production - and then the two cogitos go head to head, like two titans in a fight to the death - in which perhaps the best you can hope for is mutually assured destruction. Your gut feeling about this comes from deep within and precedes all speculations.