Musar su Genesi 27:37

And the penitent should also pray to God to erase his transgressions like a fog, and his sins like a cloud; and that He desire him, accept him and listen to him as if he had not sinned - like the matter that is written in the words of Elihu about a penitent after [he has suffered] afflictions (Job 33:26), "He prays to God and is accepted by Him." For it is likely for the iniquity to be forgiven and he be redeemed from all afflictions and from all decrees, but God [still] not desire him and not want to accept an offering from him. And it is the desire of the righteous from [their] successes, to incline God's will towards them and that He should desire them. And his will is [for] real everlasting life and for the great light that includes all of the pleasant things - like the matter that is stated (Psalms 30:6), "when He is pleased there is life." And it [also] stated (Psalms 80:20), "O Lord, God of hosts, restore us; shine Your countenance that we may be delivered" - and our Rabbis, may their memory be blessed said "(Midrash Tehillim 80), "We have nothing besides the shining of Your countenance." And that is the matter of [His] desire - and we have already mentioned this and explained it. Therefore you will see in the prayer of David at the time of [his] repentance after he said (Psalms 51:4), "Wash me thoroughly of my iniquity, and purify me of my sin," [that] he prayed further about the desire - that God's desire, may He be blessed - for him to be like before the sin. So he said (Psalms 51:13), "Do not cast me out of Your presence, or take Your holy spirit away from me." Afterwards he prayed and said (Psalms 51:14), "Let me again rejoice in Your salvation" - that the miracles of God and His salvation be found with him, and that the spirit of God would come upon him as at first. And afterwards he [continued], "and a generous spirit sustain me." Its explanation is - behold I have been lessened because of my transgressions and am not fitting to be a prince, and for Your holy arm to be revealed upon Me. And even if you have lifted (forgiven) the iniquity of my sin, I am not worthy to be beloved and acceptable as in earlier times. Yet sustain me with a generous spirit; for there is no end to Your generosity and Your goodness. And [the word,] spirit, comes lacking a [letter,] bet (in front of it, which would mean, with the spirit), like [in] (Genesis 27:37), "sustained him grain and wine" (which is to be understood as if grain was preceded by a letter bet, meaning "with grain, etc."). And Hosea, peace be upon him, said about this matter (Hosea 14:5), "I will heal their affliction, I will take them back in generous love." The matter of generous love is like the matter that David said, ["and a generous spirit] sustain me."

All of these ideas are alluded to in the blessing that Jacob took from Esau. Since Isaac personified the מדת הדין here on earth, he loved Esau who צד ציד, i.e. hunted people, acted as Satan does. Esau's other name אדום alludes to something red, i.e. blood. Isaac, on the other hand, represented the redness of the wine which is still preserved inside the grapes. There was an affinity between Isaac and Esau which is symbolized by wine and blood respectively. Jacob prepared delicacies for his father in Heaven at the advice of his mother who symbolized כנסת ישראל, the concept of the Jewish people. Jacob realized that all of his father's desire was concentrated on the delicacies he had prepared. He therefore prepared them with a mixture of sweet water and rooted himself in holiness in the mystical dimension of the birthright [having acquired this from Esau]. By doing this, he forced the wicked Esau out of occupying a higher spiritual plateau than that of himself, and he caused Esau to separate himself from Jacob and to go to his own country and his own people. He would forthwith not be able to act as accuser, but would be turned into a perennial slave, just as the slave in Exodus 21,6 who has his ear pierced as evidence that he belongs to his master permanently. Isaac explained all this to Esau when he said to him: הן גביר שמתיו לך, "Here I have made him senior to you." At that point, Isaac's former name קצחי was changed to יצחק.