The actual book isn’t released until the 9th, however I did happen across a concept of acquiring/using a “demonic” consciousness as a kind of “space suit” so to speak to retain individuation deeper into Source consciousness a while ago, post below - this is based on the dilemma that one necessarily sheds most individualised self-concept to attain “merger”/Self-realisation, as in, becoming one with the consciousness that underlies all things.
That consciousness exists well outside any kind of duality, which includes the desire/aversion duality, and therefore when actually as one with the Source of all creation, it is all but impossible to also use that self-as-Creator state to make things happen.
The metaphor of the space suit goes like this - if Source exists so far beyond individuation that the small self cannot exist strongly enough to influence it, that’s somewhat like the way in which humans cannot for example get too close to the actual Sun without burning up, but we can create armoured suits that greatly increase our ability to retain bodoily integrity and get closer than would normally be possible.
And the ancient Cannibal Hymn and other concepts found hinted at in the PGM where one self-identities with a god (bearing in mind the Egyptians only defined harmful entities as “demonic” and that the term is currently used for beings who are pretty much actually gods in their own right) also suggest that adopting the state of a spirit/demon/daemon allows one greater access to self-identify with creative powers underlying the material realm, and operate them by acts of will.
Maybe Belial found a cheeky hack for that? 
Dunno, anyway it’s also known as the Divine Paradox in the Kybalion and resolving it was what prompted me to join this forum, I feel I have now satisfactorily attained methods so close to being able to do it as to be non-different from that goal, so I feel genuinely qualified to speak on the concept, even if that may not be what the goal is of this work, or Belial’s work, here: