Toldot Tikkunim

According to kabbalistic teachings, Yitzchak corrected the spiritual damage caused by Adam's sin.

Therefore, just like Adam had been led by the ingenious plot of the serpent, the correction of Adam's sin had to come through ingenious trickery: ''Your brother came ingeniously and took your blessing''.  [Toldot 27:35]

Source: Likutei Sichos Lubavitcher Rebbe

The B’nei Yissachar takes this concept one step further. A number of commentators are bothered by the fact that Yaakov had to resort to such deceit in order to receive his father’s blessings. As the legitimate inheritor of Yitzchok’s spiritual legacy, shouldn’t Yaakov have been able to receive what he deserved in a more straightforward manner? 

Citing the Zohar HaKadosh, the B’nei Yissachar explains that Yaakov represented the tikkun [refinement] of Adam and his sins. Yaakov’s arch-nemesis was his wicked twin brother Eisav, who is described by the Torah [25:27] as a “yodeah tzayid” – hunter. The Targum Onkelos renders this phrase “gevar nachshirchon,” hinting that Eisav represented the nachash – serpent. Because the serpent enticed Adam and Chava to sin through tricky, underhanded methods, Yaakov had to rectify its previous triumph by successfully taking the blessings away from Eisav using similarly devious tactics.

The Arizal teaches that Rivkah was a gilgul [reincarnation] of Chava, the first woman. One of the purposes of reincarnation is to give a soul the opportunity to rectify the sins that it committed in an earlier lifetime. In what way did Rivkah correct the sin of Chava and atone for its consequences?

After the serpent convinced Chava to eat from the forbidden fruit of the tree of knowledge, she immediately gave some to Adam to eat. Rashi explains that she did so out of a fear that after her death, Adam would remain alive and would find another mate. As a result of his sin, Adam was cursed with death and with the pain and difficulty of sustaining himself.

Because Chava ensnared Adam in sin when he listened to her, her descendant Rivkah learned from her mistakes and rectified her sins. In contrast to Chava who caused Adam to eat something forbidden, Rivkah saved Yitzchak from eating from the food that Eisav brought him which was not properly slaughtered, and according to some opinions was dog meat [Targum Yonason ben Uziel 27:31].

Source: ShemaYisrael