17. Each level is meant to contain five lights, which are called yeḥida, ḥaya, neshama, ruaḥ, and nefesh. These are enclothed in five vessels called Keter, Ḥokhma, Bina, Tiferet (which contains Ḥesed, Gevura, Tiferet, Netzaḥ, Hod, and Yesod), and Malkhut. Since, on account of the ascent of the Malkhut to Bina, only two whole vessels are left in the level, Keter and Ḥokhma, while three vessels, Bina, Tiferet, and Malkhut, are missing from it, only two of the lights remain, nefesh and ruaḥ, which are enclothed in the two vessels of Keter and Ḥokhma, while the three lights of neshama, ḥaya, and yeḥida are missing from it, since they have no vessels in which they may be enclothed.
Each Spiritual Level Designed to Hold Five Lights
Introduction to Sulam Commentary 17:1