Part 2: This is the order of the Name of HaVaYaH, blessed be He for ever and ever. As I have written above in connection with the trees, this is the Tree of this holy Name. It continues unfolding in accordance with the intrinsic nature of its letters in the same order in which they appear in the Name in the mystery of ten and the mystery of four, as discussed above. As to the significance of the letters themselves: the Yud is Arich Anpin (the cusp) and Abba (the main body of the Yud); the first Heh is Imma; the Vav is Zeir Anpin and the second Heh is Nukva, in this order and in the mystery of the four expansions.
The Yud corresponds to AV=72; the first Heh corresponds to SaG=63, the Vav to MaH=45 and the second Heh to BaN=52. (See Opening 22 Introductory Note.) In sum, all that exists is founded on the mystery of this Name and upon the mystery of these letters of which it consists.