Archaeologist Eduardo Matos Moctezuma, in his essay "Symbolism of the Templo Mayor," posits that the orientation of the temple is indicative of the total vision that the Mexica had of the universe (cosmovision). He states that the "principal center, or navel, where the horizontal and vertical planes intersect, that is, the point from which the heavenly or upper plane and the plane of the Underworld begin and the four directions of the universe originate, is the Templo Mayor of Tenochtitlan." Matos Moctezuma supports his supposition by claiming that the temple acts as an embodiment of a living myth where "all sacred power is concentrated and where all the levels intersect." Said myth is the birth and struggle between Huitzilopochtli and Coyolxauhqui.