I'd rather start with conscious awareness, because that's where I feel it all starts. And really, I wouldn't know how to start there so on to your question. Very roughly, the way I experience it is that the spiritual is a type of experiential awareness that is beyond/outside (I don't know if that's the right wording) the physical realm.
Thanks for responding .. (I'm still intrigued). I'll try to relate.
So, I regularly become consciously aware of a sensation (a craving). When that happens, I usually feel hungry .. I eat and that feeling goes away. Science's model for 'a sensation' there, is (roughly) defined by the process of gathering information about the surroundings through experiences called stimuli. It then gets into sensory organs, cells cranial nerves, etc. The model called
transduction becomes the model for explaining the translation from stimulii into actions (like eating). Enzymes, proteins and ion channels, etc are also involved.
Now, I notice from your description you already had in place the model of an awareness that must be 'beyond/outside the physical realm'. So why that particular model? Is it, perhaps, an assumed, undistinguished one that was held as being 'true' before the actual onset of the experience?
The reason why I asked about "belief" is because what we mentally do with that inner spiritual experience can lead to "beliefs". I think that's the result of the need to put the experience into something a person can understand in this physical world. That includes myself. The trick is being aware that beliefs are just that...beliefs. And I know for a fact that my beliefs change. So I try very hard not to put my beliefs out there as truths. That we have consciousness I think is something we can agree as truth. Where our consciousness can take us is evidentially a different question.
Sure .. and beliefs can be instantaneous too .. sometimes it takes time for the 'higher' intellectual functions to catch up with them (like rationality and reason, etc). Sometimes that analytical reasoning never kicks in, so the remnant sort of becomes a familiar, undistinguished 'weird feeling' and then becomes a kind of automatic, defacto, 'frozen-in', model held in place by our conscious, aware minds.
This happens for me quite often in sports requiring instantaneous reactionary responses .. (like snow skiing .. which now represents to me, a reliving of those 'weird feelings'). It shows up in others' descriptions of what they're experiencing in eye-hand sports too .. like I've heard golfers talk about sensations which would otherwise necessitate 'insanely' precise instruments, with feedback, in order to replicate their achievements in some after-the-fact experimental set up .. but what they're really doing is exploring the 'weird feelings' and revelling in them .. (sometimes for their entire lifetimes!)