The essential key to the Zohar is the symbolism of the ten sefirot, the various aspects of God’s personality. Following is a brief outline of this complex spiritual realm. (See the chart on p. xxii.) The first sefirah shares in the unknowability of Ein Sof (the Infinite) and is sometimes referred to as Ayin (Nothingness). As one kabbalist puts it, “Ayin is more existent than all the being of the world. But since it is simple, and every simple thing is complex compared with its simplicity,