In the story of Esau and Jacob, scripture reveals that our salvation is not of man's effort or lineage. It is be divine appointment and not by anything man has done or can do.
17 And these are the years of the life of Ishmael, an hundred and thirty and seven years: and he gave up the ghost and died; and was gathered unto his people.
21 And Isaac intreated the LORD for his wife, because she was barren: and the LORD was intreated of him, and Rebekah his wife conceived. 22 And the children struggled together within her; and she said, If it be so, why am I thus? And she went to enquire of the LORD. 23 And the LORD said unto her, Two nations are in thy womb, and two manner of people shall be separated from thy bowels; and the one people shall be stronger than the other people; and the elder shall serve the younger. 24 And when her days to be delivered were fulfilled, behold, there were twins in her womb. 25 And the first came out red, all over like an hairy garment; and they called his name Esau. 26 And after that came his brother out, and his hand took hold on Esau’s heel; and his name was called Jacob: and Isaac was threescore years old when she bare them. 27 And the boys grew: and Esau was a cunning hunter, a man of the field; and Jacob was a plain man, dwelling in tents. 28 And Isaac loved Esau, because he did eat of his venison: but Rebekah loved Jacob.
29 And Jacob sod pottage: and Esau came from the field, and he was faint: 30 And Esau said to Jacob, Feed me, I pray thee, with that same red pottage; for I am faint: therefore was his name called Edom. 31 And Jacob said, Sell me this day thy birthright. 32 And Esau said, Behold, I am at the point to die: and what profit shall this birthright do to me? 33 And Jacob said, Swear to me this day; and he sware unto him: and he sold his birthright unto Jacob. 34 Then Jacob gave Esau bread and pottage of lentiles; and he did eat and drink, and rose up, and went his way: thus Esau despised his birthright.
4 According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love: 5 Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will,