Which one? The Hindu / Buddhist / Sufi Islamist philosophy of everyone being connected and being reborn / recycled comes pretty close to the scientific postulat

Which one? The Hindu / Buddhist / Sufi Islamist philosophy of everyone being connected and being reborn / recycled comes pretty close to the scientific postulation that "energy is constant and can neither be created nor destroyed but only converted from one form to another". So when we die, our energy conserved in our body becomes something else. The caveat of the first law of thermodynamic is that all this happens only "in a closed system". So is God within this system, a part of the system and part of the energy in this system (which would mean that when we attain Moksha / Nirvana and escape the cycle of rebirth / reconversion, we become a part of God)?. Or is God outside this system?