All throughout time, people have consistently gazed upon the black veil, for which they shall never see the other side until their time. As creative little monsters, we have theories and ideas of all assortments all throughout time. It is understandable to feel uneasy, but it is vanity to resist the inevitable. Finding comfort and solace in life FOR death is a better frame to start with. The ego of our incarnate human form as we remain vivid, is the illusion of reality that we perceive from the shroud of frequency encircling us.
These eternal questions have many avenue's to explore for yourself, and its likely you have to abandon any absolute narrative lest you fall into cult mindedness. The authority for which most theories transpire are generally subjective.