Kabbalah к Берешит 1:14

Rabbi Elazar said, We have learned, night was under the control of Esau, meaning the left side without the right. At that time, it is written, "Let there be lights (Heb. מְאֹרֹת)" (Beresheet 1:14), written without the letter Vav, being Wednesday eve, which could not give light without Chassadim. For this reason, "Jacob remained alone," as Jacob, representing the sun, denoting Zeir Anpin, remained alone without the Nukva, as the moon, the Nukva was concealed from the sun, namely zeir anpin, called 'Jacob'. Yet, the Holy One, blessed be He, continued to guard Jacob enough so that Esau's officer could not overcome him, as it is written, "He saw that he did not prevail against him" (Beresheet 32:25).H

Come and behold, The merit of Jacob was such, that he (Samael) wanted to exterminate Jacob from the world. That night was the night when the moon was created (it was Wednesday evening). And Jacob stayed alone, and no one was with him, as we have learned that a man must not venture out alone at night. This is even more true on the night when the luminaries were created, for then the moon is defective, as it is written, "Let there be lights (Heb. מְאֹרֹ''ת)" (Beresheet 1:14), and the word מְאֹרֹ''ת is spelled without the letter Vav, which is a sign of a curse. Because Jacob remained alone that night (he was in great danger) because when the moon is defective, the evil serpent is strengthened and rules. Then Samael came and denounced Jacob and wanted him to perish from the world.

The fourth precept: to know that Hashem is the Elohim. As it is written, "Know this day, and consider it in your heart, that Hashem He is the Elohim"(Deuteronomy 4:39). Meaning, that the name Elohim is included in the name of Hashem, and acknowledged as one and inseparable. And this is the secret of the verse, "Let there be luminaries (Heb. מְאֹרֹת) in the firmament of heaven...to give light upon the earth" (Genesis 1:14-15), that both names should be as one without any separation. Thus, מְאֹרֹת, spelled without a Vav, should be included within the term heaven, because they are as one and inseparable. Black light (Malchut) within white light (Zeir Anpin). Both are as one without separation.

R’ Eliezer said to him: Father, is it so above that they learned that there is no body/guf and no substance/g’viyah? He said to him: My son, about the coming world was it said, for that is an upper (i.e., purely immaterial) mother, but below there is the body of this world, which is the Shekhinah below.