Man is born from the dark.
A soul that is kindled, flickers and dies in the shadow of his gods.
The human soul is fragile, and death comes quickly.
But the spirit is strong and it clings to life like only a mortal can.
So in a way, Man was not designed to become undead.
Fear of death is what lets us live.
Take that away and humanity becomes harder to hold on to, without humanity you could become more hollow than man.
Yet an undead that would die for something has nothing to fear, because death would Simply become a stepping stone to his goal.
If you fall down seven times, stand up eight, that is the cry of the undead.
It's not a matter of life and death, its about what breaks first:
Or the barriers in your way.
(credit to VaatiVidya)