When my death seems 'acceptable,' a 'natural' occurrence, I wonder whether I am thinking about it concretely and honestly enough. I wonder whether I am really confronting my own utter destruction as a subject for whom there is a world, as opposed to myself as an object in the world. If I view myself as object, I can 'hold myself in reserve' and imagine that I as subject will somehow survive destruction. I can think of death as a drastic transition rather than as annihilation — which it may well be.
If you say it is certain that death is annihilation, then I pronounce you a dogmatic fool.