To simplify, everything could be labeled as light manifested in different intensities through different beings. All of them unique. There is no “source” behind those manifestations.
We are everything. One.

“Charlie” is a manifestation of that light. He is a human being. When Charlie realizes that he is different from everything, an individual, that point is historical: A shadow is created from that light.

That shadow will solidify itself as that consciousness of individuality strengthens. That sense of self is a psychological shadow created with our own mental energy.

Obviously when Charlie “dies,” that shadow will remain. It does not need a body to survive.
“This is the way I am.” That is a shadow.

Living life in joy is possible when we become aware of that light, that energy; for that is our nature.

There is nothing wrong with the shadow. It is an experience like anything in life, although; our minds may condemn it and reject it. It just needs to be integrated into the light.

The paradox of “Being and non-being” is represented by the duality of light and shadow. Both experiences are possible due to the existence of the “self.”

Religious spirituality is stuck in the sense of self and its shadow.
The shadow may be called a “vice” a “sin,” “impurity,” etc. Then, to get rid of that shadow will be the dogma to pursue.

That is the illusion.

That method only strengthens the sense of self.