The Emperor rules primarily by Logos and thinking; the Empress is chiefly concerned with Eros and feeling. For the Emperor, objective fact is honest truth; for the Empress, inner fact is primarily important.
Nichols establishes the Emperor as the archetypal carrier of Logos and objective reality, defining him through his constitutive opposition to the Empress's Eros-governed world.
, Jung and Tarot: An Archetypal Journey, 1980thesis