1.  The first and topmost of the Sephiroth of the cabalistic Tree of Life. The term is a Hebrew word meaning "Crown." It represents the archetype of the number 1, the undifferentiated Godhead. It corresponds to the divine name Eheieh, the archangel Metatron, the angelic choir called Chayoth ha-Qadesh (Holy Living Creatures) and the Rashith ha-Gilgalim, or Primum Mobile.

2.  In Kether is the Divine White Brilliance, the scintillation and corruscation of the Divine Glory—that Light which lighteth the universe—that Light which surpasseth the glory of the Sun and beside which the light of mortals is but darkness, and concerning which it is not fitting that we should speak more fully. And the Sphere of its Operation is called Rashith Ha-Gilgalim--the beginning of whirling (or whirls, or whorls), the Primum Mobile or First Mover, which bestoweth the gift of life in all things and filleth the whole Universe. And Eheieh is the Name of the Divine Essence in Kether; and its Archangel is the Prince of Countenances—Metatron or Metraton, He who bringeth others before the face of God. And the Name of its Order of Angels is called Chaioth ha-Qadesh, the Holy Living Creatures, which are also called the Order of Seraphim.