Kabbalah sa Genesis 27:4: Sha'arei Orah

Now, because of this Yitzchak said, “It is not fitting for Esav to inherit the supernal spiritual blessings of Godly intellect. It rather is more fitting for him to inherit the lower bodily blessing. It therefore is appropriate to bless him with physical things that the body delights in, such as food and drink.” This is why Yitzchak told Esav,³⁵²Genesis 27:4 “Make delicacies for me, such that I like, and bring them to me and I will eat, so that my soul-Nafshee-נפשי may bless you.” The verse specifies “my soul-Nafshee-נפשי,” certainly referring to the physical soul called the Nefesh-נפש, which receives the food, rather than the Godly and spiritual Neshamah-נשמה level of the soul. In this way, our forefather Yitzchak, peace be upon him, sought to lighten the punishment of the Jewish people in exile, and to extract them from the judgments of purgatory (Gehinom).