Life after Death

The idea of the Epicureans that life after death doesn't exist is one that I will morally have to disagree with, but in terms of thinking logically I can understand where they come from. In Book Three Lucretius somewhat acts as nature and basically states that dreading death or life after death is selfish of us as humans. I took this as basically if you've lived a rather good life why would you be selfish and expect an even blissful after life, or a longer life span. This is an example of human greed but that is one thing that makes us mortal we always want more we will never be satisfied with what we have. Another example is if you've had a horrible life why would you dread death its gives you an ability to end all the hurt you've been through. But the idea of a life after death is the way that us as humans make sense of the idea that one day we will die our partner will die, our children,  or our parents will not be here----but knowing that we could possibly have a life after we leave makes death not so frightening.
The thought process of us being to cope with death is where I can agree with Stoicism; we all know and understand that we are mortal and all mortal lives will end, but for some reason we always seem to fear our own death or that of our loved ones. We might say we grieve or not know how to handle it due to the belief of it being the unexpected we can go at anytime. But the idea used by Epictetus with the cup breaking opened my eyes to the fact that simple things such as a cup breaking or a phone breaking is also unexpected. If these as we view it "everyday" issues are also unexpected why can we get over them so easily?
That is because we value ourselves greater than these inanimate objects (which in my opinion is true), but this goes back to us as humans being selfish if we have lived a great life or even suffered greatly we should accept death as it is. And by accepting death I feel as if we must make ourselves believe in life after death that's fine and will help us not be selfish that is when it comes to death.