Why is death so final?

I hate death. It comes and steals people we love when we least expect it. It destroys things we know, breaks up families. It is so final. How can they lie there so silent? Forever.

Forever is such a long time, and makes me think they did not even exist. In time your life memories are filled with nothing but ghosts.

Have you any sayings or poems or thoughts on death, that help the bereaved?