i don't wish to debate the accuracy of your experience , however i will challenge it a bit - perhaps all psychotics believe they are on a higher plane of thinking , this does not imply that all those on a higher plane of thinking are psychotics
The same place that Psychonauts try to reach out too.
It is quite hard to imagine, I think, and even myself I can only explain the idea of it but not how it actually felt.
I wouldn’t say this was anything spiritual, rather than the thinking stopped working as a stream of thought but more like a graph traversal.