Please inform me as well, who governs all the hidden worlds that the Kabbalists did not speak about, and who sustains and reveals them. If Zeir Anpin is in the realm of Atzilut, then he sustains and provides for them, and they worship and prostrate themselves before him. But if the Infinite is their leader, and they serve Him alone, then we serve Zeir Anpin, for he sustains us and is our God, as the Kabbalists have said.
According to this, the Infinite is the God of the upper realms, while Zeir Anpin is the God of the lower realms, and here we have two distinct authorities, God forbid. Specifically, some of them have said: "You have seen all the great works of the Lord, which is greater than any small thing." Our true Rabbis have said, as it is brought in Menorat HaMaor, Parashat K'M'G, that at the time of the giving of the Torah, He (God) tore for them seven firmaments and opened seven lands, and He said to the Israelites: Understand in the upper realms and understand in the lower realms, and know that there is no God other than Me, neither in the upper realms nor in the lower realms.
I am the Lord your God. In Midrash Rabbah, Parashat Yitro, it is said: "I am the Lord your God." Rabbi Abbahu said a parable: It is comparable to a king of flesh and blood who stands before you, and he has a father, a brother, or a son. The Holy One, blessed be He, said: I am not like that.
I am the First, and I am the Last, and besides Me, there is no other God. I am the First, who has no father. "And I am the Last, who has no son. Besides Me, there is no other God, who has no brother."
This is the content of the Midrash, etc. Rabbi Eitz Yosef, may his memory be a blessing, explained that when a mortal king has a father, his kingship is not complete because he must honor his father and share his kingship with him. Or he has a brother who shares the honor of the kingship. Or he has a son who exercises authority with him and becomes his successor. The phrase "Besides Me, there is no other God" means that He has no father, which is the primary cause [of His existence].
And He has no brother because He is unique and has no second. And He has no son in the sense that the qualities derived from Him are not inherent in a manner similar to a son from a father, as some have speculated (which is the viewpoint of the Kabbalists who said that Zeir Anpin is a son of Imma and a father to the subsequent generations, etc.). And He has no sister or female siblings, for according to that viewpoint, He does not have the ability to change anything in the world, and His kingship is not complete.
But the Almighty, blessed be He, said: "I am the Lord your God." This is an expression of His power to bring them out of the land of Egypt, for His kingship is complete, and there is no power that can challenge Him, as explained above.