Just to clarify, what I call the soul is of course the so-called divine spark.

When one sells one's soul, one is actually giving up one's divine spark and disconnecting from a higher consciousness (perhaps to gain fame or fortune or something else that pulls "down" into the matter). From a certain point of view, the soul can be considered a spirit as well, if it is in connection with the connection to the divine spark, but it's not the same.

The soul as such, as a lot of people imagines it (like white figures, dense fog, etc.) is only a hologram manifesting into this world (coherent light radiation of two beams black sun and bright sun) and drains the energy only. It is through this a "hologram" that they enter the entity's physical bodies, which can then manifest as obsession. I don't want to elaborate, it's very simply written.

It's quite hard to explain in words, I know people are confused about this.