Kabbalah Library

331) “And God placed them in the firmament of the heavens” is righteous, Yesod. Although it is written, “in the firmament of the heavens,” and the heaves are ZA and not Yesod, “in the firmament of the heavens” is the conclusion of the Guf [body]. The heavens, ZA, which is Tifferet, is the Guf of the Sefirot HGT NHY, and Yesod is the last Sefira in it. It is regarded as standing at the Sium of the Guf. This is the reason why the text calls it, “in the firmament of the heavens,” the Yesod that stands at the end of the heavens, the end of ZA.