There is a day that the corruptible and mortal will become incorruptible and immortal. One can not deny that death is real. We will all die at some point or another. Death is an adversary that can not be avoided. No power here on this earth is capable of stopping death. Death will catch us all. We should all live like today is your last day and do Gods work like it's your last, having a sincere fear of being judged. The death of the wicked, the lost, have sin and no remedy for it and it is a sting an uncomfortable feeling. A saved person has had their sins forgiven by God and therefore the sting of death has been removed. So what sin is the sin that can't be forgiven of? It's the sin of rejecting Jesus Christ as your personal savior. If you die without accepting Jesus Christ as your savior that sin will keep you out of Heaven. Your salvation is not based of you or a priest, it's based on accepting Jesus Christ as your savior.