OBE to me is a great proof of after life. But I acknowledge there are too many unknowns. For instance, one thing that bugs me is the "memory" problem. When I am out of my body, I can still remember a lot of things. But memory stored in brain and it is nothing more than chemical activity. So how come I still have memory when I am out. Either memory doesn't take place in brain or I am still connected to my physical brain when I am out and somehow there is an information transfer.