I wouldn't want to associate normal brain functioning with a lack of spirituality, nor disruption of the brain with spirituality.
The question about the difference between plain insanity and the mystical experience is a very legitimate one, though.
No matter how heavenly ...... If on the other hand, people would start to believe that the elves could make them fly in THIS world and people would attempt to 'fly' from tall buildings, bridges or mountains, then someone is in a state of belief that clearly conflicts with the matters of...."
Your assuming to much, though i have never seen anyone fly, that dosent mean that people could not learn to fly. Because you truly don't know, you can never honestly dismiss it. Imagine humanity evolveing and more commonly usig TK, picture what TK is, you can move things with your mind, well, you exist so i assume you could also move yourself, thus flying, not by wing, but by overcoming gravities pull on you. You may think this will never happen, but as we evolve more people do seem to take interest in all different so called special talents. We now have physcic's helping police solve crimes, must be real if it really helps the police. So we have plenty of room to grow, what if the aliens didn't tell you that you could fly, maybe they showed you how to lift yourself with kenetic energy, maybe when you got back to the Real-World you remebered and used this energy to fly. I really doubt anyone would here a visual tell them they could fly, and instead of trying to fly straight up they decide to try for the first time by jumping off a building, come one, people aren't that dumb.