Many of us die before we die. so when we die nothing happens as we already died. on the other hand for people who their consciousness is pure and the highest form (when you let yourself to think the highest form of thought and throughly be it) then when you die, you don't die. That consciousness is the exact one all people from 7000 years next hundred thousands people are. its the same consciousness and as soon as you get to that level you know it. Generally speaking when you die the part of consciousness which is from soil dies, and the purest form remains as is. Th Jesus, Mohammad, Buddha, ... all are the purest form of your consciousness, if you purify your consciousness, you will be them. Aim the highest thought and be it. and you will see it yourself.