I agree, Carl, that different people seem to respond differently to different stimuli ~ to pain, for example ~ and that some people do seem to be more "spiritually in tune" than others ~ though defining or explaining that would not be easy.
Maybe we could say that this could include people who have seen ghosts, or interacted with deceased people in some other way, for example.
But that leaves us open to asking about those who are deluded, or who hear voices because of a mental illness, perhaps, or because drugs have been used.
I suppose that I don't have a problem so much with people believing in God or a holy spirit ~ I don't actually have a problem with anyone believing anything ~ but I have a problem accepting that God, if God exists, is as described in the Bible, and that people accept that God is this way.
As for proof, I think that it is normal, if presented with the apparently unbelievable, to ask for proof or evidence.
When members have come on here claiming to be God incarnate or an angel of God, or whatever, those people have been challenged ~ by 'believers' and 'unbelievers' alike. Provided it's not done rudely, I think that this is to be expected.
So, while I can perceive of some sort of spiritual element to life, I must also accept that those who do not believe in such a possibility will question me ~ and may be right. And I know that I will become frustrated, because this is something I sense, rather than something I can prove.
The point is, I don't know ~ ~ back to agnosticism again. I don't know if the spirituality that I can conceive of is real, or an invention of my own imagination. I don't know if the voice I occasionally hear is real or an invention of my own imagination.
But if that voice is real, it could come from deceased relatives; or the mass subconscious, or telepathically from a loved-one, or from my own mind. I don't know. I don't understand how others can feel so sure that they do know.
If I were to say that the real God was Zeus, rather than God as described in the Bible, I'm sure that people ~ including Christians ~ would argue points with me and request evidence. I would expect that.
Or am I wrong?
We discuss; we don't convert ~ that's why we always reach stalemate, I think. But that's ok. It's all part of the learning process; all part of life's rich pattern.