We have thus explained the manner that the five partzufim of Adam Kadmon emerge, which are referred to as gulgalta: Ab, Sag, Mah, and Ban, in that descending order, such that each lower partzuf lacks the higher level of light of the one above it. The Ab partzuf lacks the light of yeḥida, and the Sag partzuf lacks the light of ḥaya as well, which is present in the one above it, which is Ab. The Mah and Ban partzuf lacks also the light of neshama, which is present in the one above it, Sag.
The reason for these differences is that this is an outcome of the amount of opacity (ovyut) in the partition upon which the fusion through collision occurs, as explained in section #18#. However, we have to understand who and what causes the amount of opacity in the partition to gradually decrease, one level after the other, so that it leads to the division into the five shiurei koma (literally, “dimensions of height”) of partzufim resulting from these five types of fusion.