Why do we fear death? Perhaps its the fear of the unknown, but we did not fear the world as we left the womb, so why is death to be feared? It's just as natural as being born, but we still seem to be un-expecting as it approaches us, and surprised when we realize it is near.
We are in fact, just as destined to take our last breath, as we are to take our first. It is because with our earthly blindness, all we are able to see is the decaying body of those passed, that we think there is any difference between birth and death. We rarely think about a next phase, and when we do, most dismiss it as idealization. When did we become so blindly trusting in our own "intellect"? And so ignorant to the idea that this world is just one step in a larger scheme?
I cannot fully put into words why we feel like we do on this topic, but I can try to speak on my behalf. I don't believe (as I've been told,) that it is the farewell to the deceased, that makes the difference between birth and death, or our lives would be in disarray before that person entered it. I think it is the fact, that all we have ever known is in life. There simply is no way to imagine where the person has gone. This differs from a fear of the unknown. What I am saying now is that, We can see life created, and follow that life's story, we can share in the moments with them, but when they pass, even if you fully believe in a next step, we cannot see, or follow them any longer. They have abandoned us, all we have ever been taught to see is now gone. something beyond our comprehension will happen next. It is like trying to imagine a new color, it is simply not possible. So why should any single one of us expect to understand an entirely different form of existence? I think that is why we fear death. Not because of the unknown, but because of the complete lack of understanding and the fact that the few things we do understand, crumble with death.