Kabbalah Yesaya 56:4: Reshit Chokhmah & Sha'arei Orah

Wish [chefetz] is greater, such that a wish is a person’s will and all the workings of his attention are towards it. He does not budge from it even for a moment, like the matter that is stated, with a single mind and a wishing soul (I Chronicles 28:9). And it is the same as: And the youth lost no time in doing the thing, for he wished Jacob’s daughter (Genesis 34:19). So he did not delay the matter, and it was as if he would die in his love for her, such that he had nothing else that he wanted besides this alone. And likewise in Scripture is the finding of a mate referred to with an expression of wishing, like the matter: all of the wish that she had requested (I Kings 10:13), [about which the Sages], may their memory be blessed, explained that [Solomon] had intercourse with her. And they also explained in the Zohar, “Who have chosen what I wish (Isaiah 56:4) – undifferentiated ‘what I wish’ is the coupling of the Matriarch.” And the reason is that in mating, the entire will of a person, his heart, and all of his limbs are all focused towards it.

Know and have faith that whoever only has marital relations from the night of Shabbat to the night of Shabbat, merits having righteous children who merit the life of the coming world (Olam HaBa). This is because Shabbat is the quality of the Righteous-Tzaddik-צדיק, being that it is the matter of the Living God-El Chai-א"ל חי. About such a person it states,⁸⁸Psalms 1:3 “That yields its fruit in its appropriate time.” The prophet therefore said,⁸⁹Isaiah 56:4-5 “For thus says HaShem-יהו"ה to the barren who keep My Shabbats, who have chosen what I desire and uphold My covenant. I will give them honor and renown in My house and within My walls etc.” Now, are those who are barren the best of Israel? Do only the barren keep Shabbat? However, the explanation is that this verse refers to those righteous ones-Tzaddikim-צדיקים who make themselves as if they are barren, by refraining from marital relations during the six days of the week and only have marital relations on Shabbat nights. This is because the term “who keep” refers to the woman, as it says,⁹⁰Judges 13:13 “The angel of HaShem-יהו"ה said to Manoach, ‘Keep yourself from everything that I said to the woman.” The sign for this is “Remember-Zachor-זכור” for daytime and “Keep-Shamor-שמור” for nighttime. When they do this, what is written?⁹¹Isaiah 56:7 “I will bring them to My holy mountain and will gladden them in My house of prayer.” My holy mountain is the matter of the Living God-El Chai-א"ל חי and My house of prayer is the matter of HaShem’s-יהו"ה Lordship-Adona”y-אדנ"י, as these terms literally testify to two qualities – Remember-Zachor-זכור and Keep-Shamor-שמור. However, if heaven forbid, a person profanes the Shabbat, it is as if he denies the essential truth of HaShem-יהו"ה, being that Shabbat is the essence of the tree from below to above.