Grief is difficult. What led me to understanding when my dad died was the fact that people aren't their bodies, the body is a vessel for consciousness to inhabit; and consciousness is the transcendent, everlasting ground of all being. The great physicist David Bohm had a theory of two worlds, and Enfolded(invisible) and Unfolded(visible). The Unfolded is the realm of matter, the three dimensional world around us; the Enfolded is the home of power that transcends space and time, the ancients have been talking about it for millennia, it's more commonly known as Heaven, Valhalla, Paradise etc.