If I am to believe (again), it must be because God chooses to reveal himself to me in a way that his existence is the only plausible explanation.
I've wondered about that quite a few times....
What would convince me?
Sure, what you say sounds reasonable... I mean, if you experience it first hand, it doesn't get any better then that, right?
But then I start thinking..... there are many people today claiming such first hand experience. I'm not believing them either. And not because I think they lie. In fact I think they are very sincere about having said experience.
What I'm not buying is their explanation for said experience.
Considering the MANY known ways of how humans can be mistaken about the causal factors of events / experiences or the accuracy of their interpretations.... It seems infinitly more plausible that they are just mistaken, that the event in question was just a coincidence, that they were hallucinating, etc etc etc.
So... when it would happen to me.... assuming I don't loose my sanity or rational/skeptic mind in the process.... I think I'ld be more inclined to think that I must be mistaken. That my mind is playing tricks on me. Etc. That is, in case of "personal experience" - you know... like when nobody else is around to confirm it. When there is no way to test it or verify it, after the facts.
The logic / reasoning by which I dissmiss the explanation / interpretation of people claiming such experiences, would equally apply to my experience, right?
After all, I'm just a fallible human as well. I too have a faulty brain that is incredibly susceptible to desception. So if others can be mistaken - I can be too.
On top of that, MOST theists claiming such experience, must necessarily be mistaken.... Because they can't all be correct (since they follow mutually exclusive religions).
But.......... the CAN all be WRONG.
And considering they all make the same type of claims, chances are rather enormous that they indeed ARE all wrong.
So, it's a tough question. Normally I'ld just respond with "evidence that matches predictions of the proposed model". But you require a detailed and well-defined, and above all:
testable/falsifiable, model for that. There's no such god-model. Every god-model I've ever been presented with, was not independently testable / verifiable / falsifiable. Ever.
So, I'm left with a simple one-liner:
"
If an all powerfull, omnipotent, all intelligent God really exists... then surely he would know EXACTLY what would convince me. All he would have to do, is make that happen and then I'ld would believe".