...bang on ! couldn't have said it better.
..."evolution" if I may say so. You see, we evolve to become better for survival as species [Darwinian] and achieve ultimately teleological end [philosophy]. What are parents were, we're not and what we are, our children wont be, hence the cycle continues until the soul attains its true form, that is, spiritual realisation.
...religion [say Sikhism] offers the afterlife factor to provide some sort of relief if you like, or synthesis in dealing with the prospect of dying. Moreover, it arguably epitomises our attempt to assuage the fear of finitude, it offers existential solace
...science calls it "microchimerism", that is, most of us are walking, talking patchwork of cells, with emissaries from our mother, children or even our siblings infiltrating every part of our body.
...physical is just "one" dimension of human experience. There is spiritual, mental and emotional, as I write.
....not only that, but look at Guru Gobind Singh Ji "living" and moving amongst us everyday in "shabd saroop", meaning, in name as SINGHKAUR. It is us that don't live up to the ideals of our name giving father. Of course, that, as we all know is the human condition.
A very good summary Sir !