Chasidut su Isaia 58:78

This was portrayed in the passage at the beginning of Tikkuney Hazohar (based on ‎‎Zohar chadash 59, column 3) where the prophet Elijah ‎appeared to Rabbi Shimon ben Yochai and his son Eleazar in the cave where they were in hiding ‎from the Romans and Elijah planted a carob tree and provided a well of spring water from ‎which the two men ate and drank during the 12 years they spent in hiding. Elijah would visit them ‎twice daily and teach them, enabling them to escape prosecution by the Romans. Among the ‎lessons Elijah taught them was the fact that in order to make use of G’d’s input into the physical ‎parts of the universe, G’d had to “clothe Himself,” i.e. conceal His essence, by restricting the ‎holiness He radiated, or this would have been too overwhelming for the recipients thereof. Ari ‎zal, sums this up as: “all parts of the universe require that G’d’s essence reduces its ‎natural radiations, as all creatures in varying degrees are unable to withstand the brilliance of the ‎emanations from G’d’s essence unless they had first been screened to some extent.” According to ‎the Ari zal, any part of any universe, by definition contains a degree of substance, as ‎opposed to G’d, Who is entirely abstract, spiritual. According to this view even the purest and ‎holiest thought entertained by a living creature contains an element of physicality, since only G’d ‎can be pure spirit.‎
It follows that before G’d could undertake the creation of a physical universe He had to surround ‎His essence with “garments” shielding His creatures from this overwhelming spiritual radiance ‎emanating from Him. In order to achieve this, G’d “clothed” Himself in garments radiating light. If I ‎understand this correctly, the closer G’d came to the eventual physical world, the more subdued ‎was the brilliance exuded from His “garments,” which He changed from stage to stage so as to ‎enable the creatures in each world to tolerate it without coming to harm through being blinded.‎
All of these “worlds” (regions inhabited by spiritual beings of varying degrees of holiness) are ‎extremely bright, Isaiah 58,11 referring to them as ‎והשביע בצחצחות נפשך‎ “He will satiate your soul ‎with brightness.”‎

Delightful Love, as stated, is only experienced as a gift bestowed from above. This level is identified with Shabbos, a day which is associated with the lofty spiritual level of “delight” or “pleasure” (ta’anug in Hebrew), as in the verses (Isaiah 58: 14 and 13), “[if you observe Shabbos…] then you will delight yourself in G-d,” and “you will call Shabbos a delight.” However, as the Talmud remarks (Avoda Zara 3a), “One who toils on the eve of Shabbos will eat on Shabbos,” that is, prior preparation is necessary to experience Shabbos properly. In our context, too, in order to experience the level of Delightful Love that is revealed on Shabbos, one must spend one’s week in sincere worship of G-d and toil in the effort to bring out both prerequisite levels, ahavas olam and ahava rabba.

To understand this matter we will begin with the verse, they have forsaken me, the source of living waters (Jeremiah 2:13). Its meaning is that Blessed God is the source from whom comes the flow of life-force to all living things in all manners, there is no other besides [God] (Deut. 4:35); and anyone who is attached to [God] is attached to the root of life-force whose waters do not fail (Isaiah 58:11) – but only so long as there is no blockage from his side. For if, God forbid, on account of his sins he blocks himself from the source, his life-force will become absent; but from Blessed [God’s] side there is no blockage as the verse says, but your iniquities have made a separation [between you and your God] (Isaiah 59:2). But one whose life-force is from the Other Side, who are called broken cisterns (Jeremiah 2:13) since they are gathered waters into which fell sparks of life-force at the moment of breaking, and for this reason they are called broken cisterns – such a person is blocked from his Upper Root and is called separator of close friends (Proverbs 16:28, 17:9). And therefore the Ancestors of the World, who opened the pipelines of intelligence in the world and taught awareness to all people, how to dig himself into the aspect of a well of living water (Gen. 26:19), to be attached to the source from which comes the root of his life-force. And [the Ancestors’] disciples are called by the name “servants,” as the verse says, Isaac’s servants (Gen. 26:32), since their service of the Blessed Creator came by way of the Ancestors.