Ezechiele 1:22 Cabala: Zohar

And they shine "like the brightness of the firmament"... 1. that rests upon they who are wise, of whom it is written: "And over the heads of the living creature was the likeness of a firmament, like the color of the terrible ice...". This is the brightness of the firmament, which shines upon the entire Zeir Anpin, which is called the Torah. The brightness shines upon the heads of that living creature that is called the palanquin. These heads, which are the pillars and sockets of Zeir Anpin, who are wise shine constantly and look on that firmament to receive the light that emanates from there. This also is the light of Zeir Anpin in its entirety, which is Called Torah. It shines forever and never stops.

The upper living creatures (who are concealed) are all included in the "firmament of heaven" as it is written of them: "Let there be luminaries in the firmament of heaven" (Gen. 1:14). The verse: "And let there be for luminaries in the firmament of heaven" (tells us) that all (the lights) are suspended from that "firmament of heaven." That is the firmament above the living creatures, about which it is written: "And over the heads of the living creatures there was the likeness of a firmament, as the color of the terrible ice" (Yechezkel 1:22). This is the primal (firmament).