Our different bodies exist in different planes:
# Physical -> Astral -> Causal -> Spirit
# Gross -> Subtle -> Causal -> Source
# Assiah -> Yetzirah -> Briah -> Atziluth (From Kabbalah)
Death happens at different levels.
Physical death -> Astral death -> Causal death -> Merger into Source
# The source first empowers all the bodies in an inbreath like process, which is the sequence during the birth process:
Causal vessel/body 1st -> then Astral vessel/body 2nd -> then Physical vessel/body 3rd.
# Then the source is disengaged, an outbreath like release happens, and dying happens one by one.
First the Physical vessel lets go -> Then astral vessel lets go -> Then causal vessel lets go.
Birth and Death at all levels is the play of the spirit/source.
It is the breath of spirit.
# Spirit inbreath -> Becoming Maya (the various planes and bodies)
# Then Spirit outbreath -> where its lets go all the illusions and returns to true nature.
You trade the drop for the ocean itself, which is [the ground of intelligence, quantum field], from which all drops emerge.
To be enlightened is to know/realize at your being that you are the source itself, but operating through that drop.
This realization then maximally empowers the drop to serve the higher will of the field.