Kabbalah su Genesi 25:28

Come and behold, Esau was born all red, as it is written, "And the first came out red all over" (Gen. 25:25). Thus, he is the same as Isaac, who is of Harsh Judgment above, (in Holiness) and Esau, who issued from him, is the Harsh Judgment below. He resembled Isaac. And because each is drawn to his own kind, Isaac loved Esau more than Jacob, as it is written, "And Isaac loved Esau, he relished his venison" (Ibid. 28). Here it is written, "For he relished his venison," which is similar to, "wherefore it is said, 'like Nimrod the mighty hunter before Hashem'" (Gen. 10:9). [In both places, hunting refers to Harsh Judgment, and the scriptures tell us that he loved him because they were both of Severe Judgment.]

"And the first came out red" (Gen. 25:21). Rav Kahana explained that the liver is the first and is red. Why is it red? Because it is first to swallow the blood. Rabbi Eliezer asks, Why is it called 'first'? Because it is the first to swallow the blood from all the food; the first in blood but not in creation. And why is it that "the great shall serve the younger?" Because despite its being greater and bigger in size than the heart, it serves the heart. Rabbi Abba then asks, What is the purpose of this text if not to teach the people in the world that though there will be perfection upon earth, the path and nature of the world will not change? Rabbi Yisa said, Come and behold. The liver hunts and has venison in its mouth, while the heart contemplates and is "dwelling in tents" (Ibid. 27). As it is written, "And Jacob cooked pottage" (Ibid. 29), while thinking deep thoughts and occupying himself with the Torah.

"And Isaac loved Esau, for he relished his venison" (Gen. 24:28). This verse has been explained. Here, it is written, "a cunning hunter, a man of the field," while elsewhere it is written, "he was a mighty hunter" (Gen. 10:9). "A man of the field" is one who robbed and murdered people. And Esau said (he went to the field) to pray. He hunted (and cheated Isaac) through his mouth, as it is written, "He relished his venison (lit. there was venison in his mouth)." He was called "a man of the field," because his lot was not in a populated place, but in a desolate place, in the open wilderness, in the field. Thus, he was called "a man of the field."