Musar su Salmi 121:4

And therefore David said (see Lev. Rabbah 4:8), just as the soul fills the body and carries the body and outlives the body and is unique in the body and does not eat things of the body, sees and is not seen, and is pure within the body and does not sleep, so does the Holy One, Blessed be He, fill His world, as it is said, "Do not I fill heaven and earth? saith the Lord" (Jer. 23:24). And He bears His world, as it is said, "I have made, and I will bear; Yea, I will carry and will deliver" (Is. 46:4). And He outlasts His world as it is said, "They shall perish, but thou shalt endure" (Ps. 102:27). And He is alone and unique in His world, as it is said, "Hear, O Israel, the Lord our God, the Lord is One" (Deut. 6:5). And eating does not apply to Him, as it is said, "Do I eat the flesh of bulls, or drink the blood of goats?" (Ps. 50:13). And He sees and is not seen, as it is said, "Which are the eyes of the Lord, that run to and fro through the whole earth" (Zech. 4:10). And He is pure in His world, as it is said, "Thou that art of eyes too pure to behold evil" (Hab. 1:13). And He does not sleep as it is said, "Behold, He that keepeth Israel doth neither slumber, nor sleep" (Ps. 121:4). Therefore the soul which has within it all these qualities should come and praise the Holy One, Blessed be He, Who has within Himself all these qualities.

When we consider all this we can understand a Midrash on the words: ועשו לי מקדש, which otherwise is difficult to understand. The Midrash quotes G–d as saying to Israel: "You are My flock, and I am your shepherd." This is based on Psalms 80,2: "Give ear, O shepherd of Israel." Construct a dwelling for the shepherd so that he can come and guard you. This is why the Torah says: "They shall make a Temple for Me and I shall dwell amongst them." G–d said to Israel: You are a vineyard, since we have a verse "For the house of Israel is a vineyard of the Lord of Hosts" (Isaiah 5,7). I am the guard (of the vineyard) says G–d, for we have a verse telling us "the guardian of Israel neither sleeps nor slumbers" (Psalms 121,4). G–d said: "Make a hut for the watchman so that he will watch over you." G–d also said: "You are children and I am your father." We have a verse in Deut. 14,1: "You are children of the Lord your G–d." We also have a verse showing that G–d is our father, in Jeremiah 31,8: "For I have been a father to Israel." It is an honour for the father to be found near his children, and it is an honour for the children to be near their father, as we know from Proverbs 17,6: "Grandchildren are the crown of their elders. G–d said: "Make a Temple for Me!" Thus far the Midrash.