ZAX means "parts again limited". This is the part of the Mind that separates the spiritual understanding from the mental. Whatever your obstacle was that you overcame when you crossed it going toward the spiritual, the Governors will teach you information for removing it completely from your psyche. This will cause a merging of the spiritual and mental planes within you.
LEXARPH - "providence wills limitation beginning motion establishing life", This Governor personifies complete understanding of your True Will\spiritual essence\life’s purpose. This is what he teaches.
COMANAN - "creation becomes aware of time within the beginning of selfhood", This Governor personifies the slowing of spiritual forces that produce your spiritual Ego. This is what he teaches as well.
TABITOM - "balance begins choice enabling balance to become knowledge", This Governor personifies the process of creating the Soul, which he explains.
Crossing the Abyss as you go up toward LIL enables you to transcend the influence within you that prevents you from experiencing and understanding the Spiritual plane in it’s entirety. Crossing the Abyss (through the Governors) coming from the Spiritual into the Mental removes the obstacle that you simply transcended before, merging the Spiritual plane and the Mental plane within your consciousness.