As an anecdotal counterpoint, my girlfriend is schizophrenic, and is mostly afflicted with auditory hallucinations (she hears voices).
Weirdly, despite coming from a Vietnamese family (and being a blend of Đạo Mẫu and Mahayana Buddhist), the voices she hears are of a Christian-like "God".
My favorite lecturer on said ideas, Terence McKenna, quoted Jacque Vallée, who said that these experiences are almost always non-evangelizable.
It's as though they are almost custom made for the person having the experience. Explaining them at face value to another person either gets a "you had to be there" or just sounds like the rantings of a crazy person.
"Weirdly [...] the voices she hears are of a Christian-like "God"."
Not so weird if you get the causality around the right way. That such visions caused the idea of God is a much more parsimonious explanation than the reverse. reply
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That's so very, very true from what I can tell. It actually feels like a precursor to modern day thought; like a more basic/basal form of though/reasoning.
In a way it's more comprehensive than normal thought but it's also fundamentally incompatible with the current style of thinking though, because it brings us a much greater degree of being able to manipulate reality.
That reminds me I really still need to read the bicameral mind book...
Basically; if you integrate everything into a coherent worldview as a schizophrenic then you arrive at one of the gods; whether it's the teachings of Allah, Buddha or Jahweh.
It's essentially about defining your 'self' as 'the universe / all that is' and then following that path to it's eventual conclusion.