Part 13 · Chapter 29

And this is what it said, "Three heads are engraved," etc. And it explained that they are the aspect of "one within the other, and one above the other." The explanation: the second head is within the third, and clothes in it, as is known. But the upper head, with the second, is not in the aspect of "one within the other," but in the aspect of "one above the other," for the upper head is called RDL"A, and it is above the two heads called AA, and it does not clothe at all, except its seven lower [Sefirot], as is known, which clothe in AA.