To approach the present moment with mindfulness generally does not allow greater insight into the distant past than archaeology and anthropology.
Edit: I misinterpreted your comment. Yes, I agree that it is possible/likely that much of theology is built on top of select few people's transcendant experiences.
But I won't do any of that. What I will do is read stories about the people who did all that and interpret them with a conventional eye.
Funny.