There are some things that just do not stand up to the practise of proof. Things that are totally my experience and that do not involve anyone else are just my experience. When you tell someone of these experiences they can either accept it that you are telling the truth or reject it as a lie. Proof is not a issue. In the case of astral projection, as I understand it, it is once again a very personal happening. Do people see you “out there?” Do you stop to chat with people “out there?” I do not think so, so how could you bring back proof?