Ultimately, the lie is unveiled. But the Genesis lie narratives exhibit variations in the manner in which the deception is uncovered. In Genesis 27, the awareness of deception takes place when Isaac and Esau realize their loss. This awareness generates deep feelings.
And it came to pass, as soon as Isaac had made an end of blessing Jacob, and Jacob was yet scarce gone out from the presence of Isaac his father, that Esau his brother came in from his hunting. And he also had made savory meat, and brought it unto his father, and said unto his father: ‘ Let my father arise, and eat of his son’s venison, that thy soul may bless me’. And Isaac his father said unto him: ‘Who art thou?‘ And he said: ‘ I am thy son, thy firstborn Esau.’ And Isaac trembled very exceedingly, and said: ‘ Who? where is he that hath taken venison, and brought it me, and I have eaten of all before thou camest, and have blessed him? yea, and he shall be blessed’. And when Esau heard the words of his father, he cried with a great and exceeding bitter cry, and said unto his father: ‘Bless me, even me also, O my father’. And he said: ‘Thy brother came with subtlety, and hath taken away thy blessing’ “. (30-35)
Jacob has the same thing happen to him when he confronts Laban about being given the wrong daughter in marriage. He asks, “What is this you have done to me? Did I not serve with you for Rachel? Why then have you deceived me? “(29:25). These verbal cries are in contrast with the absolute silence after Jacob discovers that his eldest son, Reuben, has had sexual intercourse with his concubine (35:20). All the narrator tells us with respect to that incident is that Jacob (now Israel) “heard” of the incident. Only years later, on his deathbed, does Jacob give vent to his pent-up feelings (49:4).
Isaac, on the other hand, does not seem to harbor feelings of ill-will. On the contrary, he makes no reference to the way in which he has been deceived into granting Jacob the blessing (28:1). Without even hinting at what had transpired in chapter 27, some might think that he approved of the blessing being given to Jacob. He grants another blessing and commands him not to take a wife from the daughters of Canaan and to go away to Padan Aram. As far as Isaac is concerned, Esau’s accusation that Jacob’s deception is a character trait was not taken seriously. Also, he avoids any direct comment to the charge: “Is not he rightly named Jacob? for he hath supplanted me these two times: he took away my birthright; and, behold, now he hath taken away my blessing” .