I believe when alive we have interpenetrating bodies; physical, astral and mental bodies. At death the other two leave the physical body behind and we will barely be any different except lighter and freer without the clunky outer-cloak. (As claimed in Near Death Experiences). Eventually after considerable time spent on higher planes, we will become centered in our soul/Causal Body and will know and remember all our previous incarnations. Eventually if not perfected, the soul/Causal Body will spawn new blank-slate bodies which the soul/Causal Body will influence and experience the spiritual lessons to be learned in a lifetime. So, basically I believe in an afterlife, followed by reincarnations until eventual Liberation/Moksha/Nirvana and mergence in God/Brahman.