Dismemberment Of Osiris

I think that the story of Osiris, killed by his own brother and eventually becoming a judge of the underworld, show that even in the underworld, one can positively or negatively impact the outside world. For example, the dismemberment of Osiris was compared to the annual cutting and threshing of wheat and barley, indicating he would rise again with the growth of the crops. Another example is when the gods wrote to dead Osiris, who wrote back threatening to send demons of the underworld because his son had been defrauded of his inheritance.
Another story is the one of Siosire, who takes his father to the underworld to show him the fates of two different men. I think this was to show him that his judgement and fate depend on the type of person