Dear Somik, Beautiful reflections. We have held this question several times in the last couple years. What really is death? My search eased a bit when 'Katho-Upanis, had' shed some light. In this very poetic exchange between Nachiket a young boy and 'Yama' the lord of death, Yama asks some very crucial questions? When you see a seed and plant it in a ground, the seed grows into a small plant. What then happens to the seed? Similarly, when the small plant grows into a huge tree, what happens to that plant? When the plant starts having Flowers, where does that come from? When flowers give way to a fruit, what happens to that flower? Do they all die to something or is it transmutation of energy from one form to another? With that Yama leaves Nachiket holding that question for a deeper inquiry.
As you rightly said in the last para, What are we absorbing that frees us from all that feeling and roots us in Truth, resulting in Joy and Gratitude for our existence? Thank you.