Musar su Abdia 1:21

Isaac slowed the expansion of the influence of the tree of knowledge by means of the birth of the twins Jacob and Esau. This was an indication that even evil can be rehabilitated. Our sages phrased it thus: Esau's head reposes within the lap of Isaac; such is the mystery of how evil can be rehabilitated. The secret of how this happens was alluded to by our sages' explanation that the reason the pig is called חזיר, (from the root חזר to return) is that in the future it will restore the crown to its Master, as we know from Ovadiah 1,21 ועלו מושיעין בהר ציון … והיתה לה' המלוכה, "For the saviours will march up Mount Zion… and the kingdom will be G–d's." (cf. details in Kohelet Rabbah end section 1). All of these events will occur at the time when G–d will "slaughter" the angel of death. This is the plain meaning of Isaiah 25,8 בלע המות לנצח, "He will destroy death forever." This angel of death will then remain as a regular angel, since all the negative forces we know as קליפות are after all an outgrowth of a holy source. This is what was alluded to in the quote that the head of Esau reposes in Isaac's lap. When the head expands it becomes a symbol of impurity. The very name סמ-אל Samael, (Satan) reflects the dual nature of evil. On the one hand the name א-ל, G–d, is part of that definition, on the other hand the word סם represents the סם המות, lethal poison. In such a future the סם aspect of Satan/ Samael will be abolished. We, the Jewish nation however, are called by the name of G–d. Our sages interpreted Genesis 33,20 ויקרא לו א-ל א-לוהי ישראל, "He (G–d) called him (Jacob) El the G–d of Israel" (Megillah 18a, proving that the word לו could not refer to the altar Jacob had built). We have an allusion to this in Genesis 11,10 אלה תולדת שם, suggesting that we, his descendants, are all a "full name," not half a name such as סמא-ל.

And inasmuch as He had created all of these, it was necessary to create the Temple and the name of the Messiah before creating man. For in the days of the Messiah, the earth will be filled with knowledge and there will be no evil desire among men. And all people, great and small, will know the name of God, may He be exalted, with a great knowledge and then they will know, all of them, that the principal reason for the creation of the world was service to the Creator, may He be exalted. Therefore, He first created all of these seven before He created the world. "And saviours shall come up on mount Zion (Obad. 1:21) and "a redeemer will come to Zion, and unto them that turn from transgression in Jacob" (Is. 59:20). Amen. And thus may it be His will.

King David held on to the קו המלכות, i.e. the fourth "line." This is what is commonly known as מגן דוד, the shield of David. [קוים is an expression used in Kabbalah to describe the conversion of concepts into a practical effect in our lives. The concept חסד becomes רחמים, i.e. applied חסד, by means of such a קו, line. Ed.] The Zohar (Sullam edition page 70), commenting on Genesis 29,35 "she stopped bearing children," explains that the word ותעמד is a reference to the establishment of this fourth leg of G–d's throne, and that anyone who challenges the kingdom of David is considered as challenging the שכינה, the reason being that the fourth leg of the throne is supplied by the kingdom of David on earth. David is the מרכבה, carrier of G–d's Glory down here in our domain. Once that fourth leg has been contributed to G–d's Throne, His name י-ה-ו-ה will be complete. The root of the line חסד is the letter יוד. The root of the line דין is the first ה"א in that Name, whereas the line רחמים is the letter ו"או. These three lines together, formed through the attributes of the patriarchs, form a מרכבה. By adding the last letter ה"א of the Ineffable Name, G–d's name is made complete, whole. Once the Kingdom of David will flourish as that of the Messiah, once the prediction: והיתה לה' המלוכה (Ovadiah 1, 21) will be realized, the other half of that prophecy ביום ההוא יהיה ה' אחד ושמו אחד will be fulfilled also (Zachariah 14,9). The final letter in each of the last three words of that latter prophecy together spell דוד. A close look at the name יהודה will reveal some remarkable allusions. Firstly, it contains the letters of the Ineffable Name plus the letter ד. That letter, or rather the number 4 that it represents, is an allusion to the fourth leg of G–d's Throne.