קבלה על סנהדרין 77:8

41 The second type said, G-d forbid, there are two domains, one acts for the good and the other acts for evil, in saying there is nothing without its opposite, and with G-d may his name be blessed the absolute good, there would be G-d forbid opposite him one who is absolute evil; and from these two sources, they said, arise the actions in this world, some of them for the good and some for the bad. And this is the matter (Sanhedrin 39a) "From your midpoint and up is in the domain of Hurmiz, and from your midpoint and down is in the domain of Ahurmiz", which was said by a certain apostate to Ameimar: