To confront a person with his shadow is to show him his own 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. ~Carl Jung; Good and Evil in Analytical Psychology; CW 10; Civilization in Transition; Page 87