If we are not supposed to know then we will not have the answer until we die, I think you are curious because you wonder about our purpose in this life. Hey, we came with nothing and goes the same is the natural course and everything we do in this lifetime is either significant enough to remain useful or in vein.

Maybe some one did came back and tell us there is heaven and others escape from hell to haunt some of us.

After that the world I'd non your bussiness

when u die, u'll be judged by god and for the sins dat u hv made, u'll go to hell for a while (depends on how much sin u've made). After u received the punishments, u'll get to heaven..
it's simple as dat..