However, the sun doesn't rise. It's merely an illusion, subject to none other than what we imagine it to be. And yet, for some strange reason, it seems to persist.
Oh, no Iacchus. The sun does rise from our perspective and subjective feeling. It is a theory, a body of logical and experimental work, what teaches us that the earth goes around the sun. But then again, this is thanks to the fact that the world is real for every (sane) subjective entitie called human.
I interact with spirits all the time. Both in my mind and, in what you folks refer to as dreams. And yes, for some strange reason, it seems to persist as well.
Whats the difference between this assertion and one of an schizophrenic? Besides, its not unusual at all for all of us. You are not "special". We all dream with imaginary people all the time. Thats right, we all and all the time.
With some strong drugs, like ketamine, any individual can also "talk" with this imaginary entities all the time. Yep, every time.
I tell you what this proves, that the brain is constructed in sucha way that it has the ability to make imaginary characters. You choose to believe they are real outside your own existence, but the fact is that, when you are gone, all your imaginary friends will be gone to0. Nope... not to an imaginary "heaven", but to the inexistence.
In Zen Buddhism some masters say that if you see the Buddha in meditation you should kill it, the meaning of this is that those visions are hallucinations, not real, and so they should be avoided in the search for Nirvana.
BTW, this Nirvana is the realization that the ego does not exists, that its only an illusion, somehow created by our sense of existence.