These are the five levels of the attribute of receiving that are incorporated in the fourth level, which are also known by the same names as the ten sefirot – Keter, Ḥokhma, Bina, Tiferet, which encompasses six sefirot, and Malkhut – since the four levels are Ḥokhma, Bina, Tiferet, and Malkhut, as stated in section #5# above, and the fifth level is their root called Keter.
The reason the five levels of receiving that are within the fourth level are called by the names of the sefirot, Keter, Ḥokhma, Bina, Tiferet, and Malkhut, is because prior to the constriction (tzimtzum) – that is, when the fourth level was the receiving vessel for the ten sefirot that are encompassed in the supernal light, which is the mystical meaning of “He is one and His name is one,” for all the worlds are incorporated there within the supernal light,27In the initial phase or level, the vessels and lights are not differentiated at all, so all the worlds are incorporated within the supernal light. This is the mystical idea of “He is one and His name is one,” because it reflects the reality that the Creator’s essence (the light, referred to here as “He”) and His manifestation (the vessels, referred to as “His name”), were initially one, and still remain one, as neither of these aspects are outside the Creator, even after the process of differentiation. as we wrote in Talmud Eser Sefirot, part 1 – the enclothing of the ten sefirot by the fourth level was structured according to those aforementioned five levels.28The fourth level, Malkhut, is the final receiver in the series of vessels. While the sefirot are often described in a vertical, linear structure (from top to bottom), they are also referred to as garments, with the lower “bottom” ones also described as “outer.” This is the meaning of the concept of enclothing used here: The lowest, or outermost, vessel of Malkhut contains the aspects of receiving, or opacity, found in each of the preceding vessels, because it is the “garment” for all the vessels that precede it. As the author of the Sulam goes on to explain, each of the vessels contains a particular capacity for receiving the supernal light. For example, the light that fills Keter is a different level from that which fills Bina. Malkhut contains elements of receiving for each of these levels, allowing it to receive all the different levels of light that the previous vessels contain.