Notice here, I ask you, the extraordinary care of the loving God. When he saw [Jacob] consenting to the journey in accordance with his mother‘s advice, which came out of fear of his brother, and taking to the road like some athlete, with no support from any source, leaving everything instead to help from on high, Christ wanted at the very beginning of the journey to strengthen Jacob‘s resolve. And so he appeared to him with the words "I am the God of Abraham and the God of your father Isaac." I have caused the patriarch and your father to experience a great increase in prosperity; so, far from being afraid, believe that I am he who fulfilled my promises and will shower on you my care—St John Chrysostom

I have already put it to your holinesses yesterday that the reason why the elder son is called Esau is that no one becomes spiritual without first having been "of the flesh" or materialistic. But if they persist in "the mind of the flesh," they will always be Esau. If, however, they become spiritual, they will then be the younger son. But then the junior will be the senior; the other takes precedence in time, this one in virtue. Before it ever came to this blessing, Esau had longed to have the lentils Jacob had cooked. And Jacob said to him, "Give me your birthright, and I will give you the lentils I have cooked." He sold his right as firstborn to his younger brother. He went off with a temporary satisfaction; the other went off with a permanent honor. So those in the church who are slaves to temporary pleasures and satisfactions eat lentils—lentils that Jacob certainly cooked but that Jacob did not eat. Idols, you see, flourished more than anywhere else in Egypt; lentils are the food of Egypt; so lentils represent all the errors of the Gentiles. So because the more obvious and manifest church which was going to come from the Gentiles was signified in the younger son, Jacob is said to have cooked the lentils and Esau to have eaten them …

Now apply this. You have a Christian people. But among this Christian people it is the ones who belong to Jacob that have the birthright or right of the firstborn. Those, however, who are materialistic in life, materialistic in faith, materialistic in hope, materialistic in love, still belong to the old covenant, not yet to the new. They still share the lot of Esau, not yet in the blessing of Jacob―St Augustine

Sarah‘s death was the occasion for the patriarch‘s first instance of acquiring land. Sacred Scripture in fact shows us in every case the patriarch‘s virtue, in that he passed all his time as an alien and a nomad. And it mentions this latest item for us to learn that the man who enjoyed so much assistance from on high, who had become so famous and had increased in number to such a vast multitude, could not call a place his own, unlike many people today, who give all their attention to acquiring land, whole towns and great wealth beyond telling. You see, he had sufficient riches in his attitude, and he put no store by these other things. Let those heed this who in the twinkling of an eye take to themselves every conceivable thing and, so to say, stretch out in all directions their passion for avarice. Let them also imitate the patriarch, who had not even a place to inter Sarah‘s remains until, under pressure of very necessity, he bought the field and cave from the Hittites. For proof that he was in fact respected by the inhabitants of Canaan, listen to the words addressed to him by the Hittites: "You are king among us by God‘s appointment; bury your dead in our best tombs. None of us, after all, will keep this tomb from you."―St John Chrysostom