This lack of dynamics of limitation in the partition of the head is not the case with regard to the partition and Malkhut of the body. Meaning, after the ten sefirot expand from the mouth of the head, from above to below, they expand only until the Malkhut in those ten sefirot. The supernal light cannot expand into the Malkhut of the body because the partition established there prevents it from expanding into the Malkhut. Therefore, the partzuf stops there, and the end of the partzuf is reached. Accordingly, the full force of constriction and limitation is revealed only in this partition and the Malkhut of the body.
Divine Light Unfolding Through Expansion and Limit
Petichah LeChokhmat HaKabbalah 38:5