A subjective experience changed your beliefs? There are many atheists who have had spiritual experiences and become theists. The trend is that none are former freethinkers, or critical thinkers. Awareness of bias and the minefield of false reasoning is something to brag about, mere atheism is not worth mentioning. Otherwise, a person could be an "atheist" for false reasons or based on false conclusions. It's actually very common, and almost as frustrating to see as the void of thought it takes to accept religious ideas.I think not because I've experienced spiritual reality and it took only three days of it to wipe out 35 years of atheist disbelief.
Going out on a limb about your experiences, I'll let you know how a critical thinker would process strange events. For example, if a girlfriend I had in North Dakota 10 years ago suddenly fell from the sky on my way to work(I live in California) and hit my vehicle while I was flying down the freeway, I wouldn't search for "meaning". The meaning is right there, embedded in the physics of our universe. It's just that most people don't have the capacity to understand how things work well enough to know that such events are inevitable. This is true even if my ex were to survive the fall/crash. It is true even if I hear that her husband up in North Dakota was kicked in the head by a cow and killed around the same time on that same day. It holds true even if I were to arrive home that same day and find my mother's wedding ring in the mail, send to me on a whim by my sister. There is nothing mystical here, only your inability to understand the universe you live in. The "meaning", the ascription of meaning to disparate events that form a pattern, is a survival function that we'd die without. The enormously improbable odds turn out to be probable when you understand how things work.
Epistemology can explain it. Your experiences were entirely subjective and internal, most likely a misunderstanding of bias and probability.Science couldn't explain what had happened to me as science doesn't even recognize synchronicity events happen.
So if it inspires action in others, it is not fiction. Is this what you're saying? That because L. Ron Hubbard's Thetans have inspired others, the Thetans are thus real? Or does this rubric only apply to the spirits you believe in? Or do you rule out Thetans because the inspiration must be over longer periods of time. Such as the influence of Roman myths? Or Norse myths? This material, or parts of it, were the revelations of some certain ancestors of ours. What of Buddhist ideas that have inspired millions, have been around a long time, and was likely personal revelation(piecemeal). Is there truth in the idea that we will be reborn into a cow? Or is it not possible that this religiously themed idea was a product of some man's revelation?If it's real, other people pick it up and it spreads. If it's not, then it just sits in your head or you write it down, say publish it in a book, but nothing happens outside your mind about whatever you've experienced, whatever you've said about it no matter how profound you think it is.
Your rubric legitimizes all sorts of nonsensical ideas. Of course, you will have other criteria that you've fabricated which you "use" to sort the true from the false so that it accords to what you already believe. How do you harmonize Buddhism, for example?