What evidence of an afterlife would satisfy most skeptics?
I wondered about your own experience of altered perception. I definitely find music to be one way of experiencing the numinous, and have some kind of natural affinity with psychedelic experience.But, I do have intense hypnagogic and hypnopompic experiences at times, in which I am floating around in the room, knowing that my body is lying on the bed, and these are a bit unnerving.
It also seems to me that some people are more inclined to have OBEs than others, and I think that comes into play when people use any kind of substances. But, I do think that Huxley's book, 'The Doors of Perception/Heaven and Hell' is so interesting too, especially how it points to the idea of the mind being a reducing valve for mind at large, which is based on Bergson's idea. I am not saying that I am sure that perspective is true, but I do see it as a possibility.
However, what makes the OBE or NDE difficult to be seen as real 'proof' is that the person is still alive enough to return to life. But, I think that it may be the furthest proof. But, of course, it is possible to go into the real territory of 'woo'land, with people who claim to have been visited by spirits and I have a friend who speaks of having encounters St Augustine. However, all these ideas are open to critical analysis, and I of all people am aware of the need for this based on my experience of psychiatric nursing.