Musar su Genesi 28:5

There is a mystical element concealed in all this. Jacob and Esau were twins. There were two reasons for this. We have already explained that one purpose was for Esau to be able to absorb the excess pollutant from Jacob, i.e. as if one half of the baby to be born contained all the negative influences. As a result, Jacob would eventually also inherit Esau's share, the present world. Esau in fact absorbed the negative part of Jacob, whereas Jacob became the recipient of the positive part of Esau. The Torah alludes to this mystery in 28,5, where Rebeccah is described as "mother of Jacob and Esau." Rashi comments that he does not understand what new dimension the Torah conveys in the verse. I believe that the Torah teaches us that Rebeccah, in her capacity as mother of both of these twins, allocated to each one certain genes in keeping with her prerogative as a mother. This is why the Torah could describe her earlier as "personally dressing Jacob," though clearly we must understand this merely as a figure of speech, and Jacob no doubt physically dressed himself. Rebeccah had exercised her prerogative to make one twin appear like the other. Once this had been accomplished, Jacob was certainly in line for receiving blessings that were meant to be effective in this world. Jacob's principal garments, of course, were those described as בגדי עשו החמודות, "Esau's valuable clothes," also mentioned in 27,16 as having remained under Rebeccah's care. These were reportedly the skins worn by Adam, a reminder of his having rehabilitated himself after his sin. G–d had made these for him in the terrestrial גן עדן, which is situated "opposite" its celestial counterpart.