Nothing is more valuable to the evil one than his eye, since only through his eye can emptiness seize gleaming fullness. Because the emptiness lacks fullness, it craves fullness and its shining power.
Jung renders the evil eye as a metaphysical principle: the eye of existential emptiness that feeds upon beauty and fullness, identifying it with the devil as the shadow of all that is radiant and life-bearing.
, The Red Book: Liber Novus, 2009thesis