C.G. Jung: Confronting the Shadow
Peter Birkhauser: The Bear at the Tree of Light
To confront a person with his shadow is to show him his own light.
Once one has experienced a few times what it is like to stand judgingly between the opposites, one begins to understand what is meant by the self.
Anyone who perceives his shadow and his light simultaneously sees himself from two sides and thus gets in the middle.
This is why Greatness is not served on a platter. Everyone goes through the “dark night of the soul” to discover the light within them.