Ge 25:27 So the boys grew. And Esau was a skillful hunter, a man of the field; but Jacob was a mild man, dwelling in tents.

28 And Isaac loved Esau because he ate of his game, but Rebekah loved Jacob.

29 Now Jacob cooked a stew; and Esau came in from the field, and he was weary.

30 And Esau said to Jacob, "Please feed me with that same red stew, for I am weary." Therefore his name was called Edom.

31 But Jacob said, "Sell me your birthright as of this day."

32 And Esau said, "Look, I am about to die; so what is this birthright to me?"

33 Then Jacob said, "Swear to me as of this day." So he swore to him, and sold his birthright to Jacob.

34 And Jacob gave Esau bread and stew of lentils; then he ate and drank, arose, and went his way. Thus Esau despised his birthright.

Moses is showing here the different ways of life and values between Esau and Jacob as the nations Edom and Israel will eventually be.

Their ways of life:

Esau was a skillful hunter, a man of the field; but Jacob was a mild man, dwelling in tents.

Their values:

Esau was poised and privileged to be next in line as far as the blessing of the birthright was concerned. He was Isaac's firstborn son and loved by him. The birthright carried with it both material and spiritual blessings.

But Esau did not value the blessings of the birthright. He gave it away casually in exchange for a stew. There are people who see no value in spiritual things. They are faithless and unbelieving people. Jacob, on the other hand, valued it and desired for it.

Moses here is explaining as to how Jacob and the nation that came out of him (Israel) possessed the blessings promised by God to Abraham and to Isaac.