The Emperor introduces a masculine conflict to the story of Tarot. The card is attributed to the astrological sign of Aries, ruled by the Roman war god, Mars; also, the alchemical concept of Sulphur, the masculine/activating principle of existence, motivated by the fire of Tetragrammaton, the four-fold name of God. [Though this significance is most explicitly assigned to The Hermit.]
The Emperor is Major Arcanum IV. The fourth Sephirah is Chesed, which is the sphere of Construction and Order. Its symbols are four-sided: the square, pyramid and equal-armed cross; symbols of physical manifestation. The attributions of Chesed and philosophy of Four are, therefore, attributed here, despite the fact that The Emperor does not come into contact with Chesed upon The Tree.
While energies of Force and Form are seen here, there is an implied threat of disharmony. Without regulation, the intensity of force would destroy and render all form into chaos. Too much emphasis placed on enforcing Law and Order in the realm is indicative of a cruel dictator, stifling of all growth. Consciously received, with full understanding of its role, the Power of The Emperor brings great satisfaction and productivity to one's life.