To clarify, I believe that our consciousness is in its own dimension, and at the same time our consciousness is our spirit.
The way my theory of Conscapsis came about was through a very vivid dream I had during REM sleep. The dream was very brief, and I dreamed that I was very paranoid and delusional. I believed that the world was going to end, also I was hallucinating. So, when I was convinced that my hallucinations were real, I shot myself in the head. I felt my body dying, just like the accidental overdose I had in real life in 2009, where I went into clinical death, but this dream was different! When I was just going into brain death, I felt my consciousness collapsing, almost like it was creating a singularity, but I woke up before my dream brain died completely.
I read that description with interest, because it so accurately corresponds to the onset effects of the dissociative anaesthetic ketamine.
The effect, neurologically, coincides with the shutting down of the frontal lobe - in fact most activity apart from the deep limbic system.
In clinical trials not involving surgery, 80% of subjects reported some kind of interaction with a 'higher being', either God, an angel or an alien encounter. Many subjects seem delighted to discover, in the few seconds before dissociative anaesthesia is complete, "Oh my god, I can't die...".
During onset, there is often reported a kind of absorption into vortex referred to by illicit users as the K-hole into which consciousness seems to disappear like light into a black hole. The K-hole is the portal to K-space, which is described, by those who remember anything, as being completely awake yet devoid of any sense of I or it. No time, space or identity - yet still rich with qualities and pervaded by an unearthly wisdom.
The experience is very similar to reports of NDEs.
Whether this is purely the subjective experience of a specific neurophysical state, I don't know.
However, it does suggest to me that many, if not all, altered states are at root neurophysical events.
These events, which are real experiences to those who report them, are then rendered as conceptual frameworks by those who are influenced by the charisma of the visionary or whatever, and become beliefs.
Hmmm, wandered off topic a little, but I hope that's food for thought.