Part 11 · Chapter 51

And know that the Keter of ZA is from the phase of the lower half of the Yesod of Atik Yomin, which is clothed within the lower half of Arich, as mentioned above. And below this will all be explained at length, for this phase corresponds to that phase mentioned above, except that now it is in potential and not in actuality, and then it is in actuality itself. And behold, if we count together all these phases, they will be eighteen, for this is why it is called the eighteen worlds, for ZA was three, six, and nine — behold, eighteen.