Zohar Chaye Sarah
When a man connects his days to the upper levels, his existence in this world is strong. If he is not connected above then he is gradually fall down the lower levels to the point that the angel of death is allowed to take his soul. When the soul is taken, the body becomes impure and stays impure.
The body of Tzadikim that were connected to the upper levels stays in purity even after their death. The place that Sarah passed away tells us that she was pure even after her death.
In the middle of the sky, a shining path connected. It is the serpent of the sky, called by the astronomers, the Milky Way. All the small stars attached to it, like piles over piles are grouped and stand there like countless mountains. And they represent angels of the Snake that are in charge of the concealed action of the people of this world.
Groups of Klipot originating from the Snake that brought mortality to the world, spread in the world. They are in charge of people’s hidden actions. If a person does negative, they inflict judgments on that person. Those who wish to become pure, get help from above. The Light of the creator surrounds them and keeps them holy.