Ambrose of Milan : Abraham represents the mind. In fact Abraham signifies passage. Therefore, in order that the mind, which in Adam had allowed itself to run to pleasure and to bodily attractions, should turn toward the ideal form of virtue, a wise man has been proposed to us as an example to imitate. Actually Abraham in Hebrew signifies "father," in the sense that the mind, with the authority, the judgment and the solicitude of a father, governs the entire person. This mind then was in Haran, that is, in caverns, subject to the different passions. For this reason it is told, "Go from your country," that is, from your body. From this land went forth the one whose homeland is in the heavens. — ON ABRAHAM 2.1-2 Anthony the Great : Some were reached by the Word of God through the law of promise and the discernment of the good inherent in them from their first formation. They did not hesitate but followed it readily as did Abraham, our father. Since he offered himself in love through the law of promise, God appeared to him, saying, "Go from your country and your kindred and from your father's house to the land that I will show you." And he went without hesitating at all but being ready for his calling. This is the model for the beginning of this way of life. It still persists in those who follow this pattern. Wherever and whenever souls endure and bow to it they easily attain the virtues, since their hearts are ready to be guided by the Spirit of God. — LETTER 1 Augustine of Hippo : The right thing to do, brothers and sisters, is to believe God before he pays up anything, because just as he cannot possibly lie, so he cannot deceive. For he is God. That's how our ancestors believed him. That's how Abraham believed him. There's a faith for you that really deserves to be admired and made widely known. He had received nothing from him, and he believed his promise. We do not yet believe him, though we have already received so much. Was Abraham ever in a position to say to him, "I will believe you, because you promised me that and paid up"? No, he believed from the very first command given, without having received anything else at all. "Go out from your country," he was told, "and from your kindred, and go into a country which I will give you." And he believed straightaway, and [God] didn't give him that country but kept it for his seed. — SERMON 113A.10 Bede : And the Lord said to Abram, "Go out from your land, and from your kindred, and from your father's house to the land that I will show you. And I will make you into a great nation, and I will bless you, and I will make your name great, and you will be a blessing." For, speaking distinctly, the Lord mentions land, kindred, and father's house. The land of Abram must be understood as the region of the Chaldeans from which he had already departed: his kindred, the family of his brother Nahor, whom he had already left behind: the father's house, in which he was then dwelling in Haran. How then is it that he is now commanded to go out from his father's house as well as from the land and kindred from which he already seemed to have come forth? Unless perhaps it should be understood that he had left his land and his kindred with his parent with the intention, as we have previously mentioned, to return to it after reconciling with the Chaldeans in the following age: he is now commanded by the Lord to turn his mind away from the purpose of returning to Chaldea, and to take away his mind and body from the habitation of Mesopotamia as well. Leaving behind the land in which the city of pride was made, and confused by the judgment of the Lord, he was to come into the land in which he would receive the grace of the heavenly blessing and would create a new and better progeny by merit of his faith and obedience. For what he says, "And I will make you into a great nation," properly pertains to the people of Israel. For concerning the generation of other nations that were likewise to arise from him—namely the Ishmaelites, Edomites, and the peoples from Keturah, his second wife after Sarah—he says in subsequent words to him, "I will make you grow exceedingly, and I will place you among nations, and in you all the families of the earth will be blessed." This is a promise of blessing greater and far superior to the former. That one indeed is earthly, this one is heavenly: because the former signifies the propagation of carnal Israel, this one of the spiritual. The former pertains to the people who were born from him according to the flesh; this one to those who are saved in Christ from all the families of the earth, among whom are indeed those who are born from him according to the flesh and also wish to imitate his faith's piety. To all these, the Apostle Paul says, "And if you belong to Christ, then you are Abraham's seed" (Gal. 3:19). Therefore, what he says, "And in you all the families of the earth will be blessed" is as if he were saying, "And in your seed all the families of the earth will be blessed." For, to speak in the words of the Apostle, Mary was already in the loins of Abraham at that time, from whom Christ was to be born, when these things were said to him. And the wondrous disposition of heavenly severity and piety: for men gathering for a proud work deserved to be divided from one another through different languages and kinships. But leaving that province alone and willingly going into exile at the command of the Lord, he heard that all the nations divided into various provinces and languages would be gathered in him by a common blessing. Note indeed that although the world's third age is usually computed from the birth of Abraham, yet by this special oracle of the Lord to Abraham, the beginnings of the third age are consecrated according to the sufficiency of the matters themselves. For at that time, the holy seed was separated from the nations, and the Savior of all nations, who was to be born from it, was foretold. Until this time, all the faithful and righteous used to make use of that knowledge of moral life which they either knew naturally by guidance or drew originally from the doctrine of their parents. But now the knowledge also of the coming Savior in the flesh, in whom blessing and salvation were to come to all the holy ones, both those who would precede his incarnation by being born earlier and to us who believe we can be saved later by the name of the same Lord Jesus, as Peter says, in the same way as they. — Commentary on Genesis (Hexaemeron) Caesarius of Arles : When the sacred lesson was read just now, we heard the Lord say to blessed Abraham, "Leave your country, your kinsfolk and your father's house." Now everything that was written in the Old Testament, dearly beloved, provided a type and image of the New Testament. As the apostle says, "Now all these things happened to them as a type, and they were written for our correction, upon whom the final age of the world has come." Therefore, if what happened corporally in Abraham was written for us, we will see it fulfilled spiritually in us if we live piously and justly. "Leave your country," the Lord said, "your kinsfolk and your father's house." We believe and perceive all these things fulfilled in us, brothers, through the sacrament of baptism. Our land is our body; we go forth properly from our land if we abandon our carnal habits to follow the footsteps of Christ. Does not one seem to you happily to leave his land, that is, himself, if from being proud he becomes humble; from irascible, patient; from dissolute, chaste; from avaricious, generous; from envious, kind; from cruel, gentle? Truly, brothers, one who is changed thus out of love for God happily leaves his own land. Finally, even in private conversation, if one who is wicked suddenly begins to perform good works we are inclined to speak thus of him: He has gone out of himself. Indeed, he is properly said to have gone out of himself if he rejects his vices and delights in virtue. "Leave your country," says the Lord. Our country, that is, our body, was the land of the dying before baptism, but through baptism it has become the land of the living. It is the very land of which the psalmist relates: "I believe that I shall see the bounty of the Lord in the land of the living." Through baptism, as I said, we have become the land of the living and not of the dying, that is, of the virtues and not of the vices. However, this is true only if after receiving baptism we do not return to the slough of vices, if when we have become the land of the living we do not perform the blameworthy, wicked deeds of death. "And come," says the Lord, "into the land which I will show you." It is certain that then we will come with joy to the land that God shows us if with his help we first repel sins and vices from our land, that is, from our body. — SERMON 81.1 Caesarius of Arles : "Leave your kinsfolk." Our kinsfolk is understood as those vices and sins that are in part born with us in some way and are increased and nourished after infancy by our bad acts. Therefore we leave our kinsfolk when through the grace of baptism we are emptied of all sins and vices. However, this is true only if later we strive as much as we can with God's help to expel vice and to be filled with virtues. If after being freed from all evil through baptism we are willing to be slothful and idle, I fear that what is written in the Gospel may be fulfilled in us: "When the unclean spirit has gone out of a man, he roams through dry places in search of rest and finds none. If after he returns he finds his house unoccupied, he takes with him seven other spirits more evil than himself; and the last state of that man becomes worse than the first." Therefore let us so go forth from our kinsfolk, that is, from our sins and vices, that we may never again wish to return to them as a dog to its vomit. — SERMON 81.2 Caesarius of Arles : "Leave your father's house." This we ought to accept in a spiritual manner, dearly beloved. The devil was our father before the grace of Christ; of him the Lord spoke in the Gospel when he rebuked the Jews: "The father from whom you are is the devil, and the desires of your father it is your will to do." He said the devil was the father of humanity, not because of birth from him but because of imitation of his wickedness. Indeed, they could not have been born of him, but they did want to imitate him. This fact that the devil was our first father the psalmist relates in the person of God speaking to the church: "Hear, O daughter, and see; turn your ear, forget your people and your father's house." — SERMON 81.3 Clement of Rome : Abraham, styled "the friend," [Isaiah 41:8] was found faithful, inasmuch as he rendered obedience to the words of God. He, in the exercise of obedience, went out from his own country, and from his kindred, and from his father's house, in order that, by forsaking a small territory, and a weak family, and an insignificant house, he might inherit the promises of God. For God said to him, "Get you out from your country, and from your kindred, and from your father's house, into the land which I shall show you. And I will make you a great nation, and will bless you, and make your name great, and you shall be blessed. And I will bless them that bless you, and curse them that curse you; and in you shall all the families of the earth be blessed." [Genesis 12:1-3] And again, on his departing from Lot, God said to him, "Lift up your eyes, and look from the place where you now are, northward, and southward, and eastward, and westward; for all the land which you see, to you will I give it, and to your seed forever. And I will make your seed as the dust of the earth, [so that] if a man can number the dust of the earth, then shall your seed also be numbered." [Genesis 13:14-16] And again [the Scripture] says, "God brought forth Abram, and spoke unto him, Look up now to heaven, and count the stars if you are able to number them; so shall your seed be. And Abram believed God, and it was counted to him for righteousness." [Genesis 15:5-6] On account of his faith and hospitality, a son was given him in his old age; and in the exercise of obedience, he offered him as a sacrifice to God on one of the mountains which He showed him. [Genesis 22:9] — Clement's First Letter to the Corinthians, Chapter 10 Didymus the Blind : It is not by chance that God orders Abraham to leave his land and his relatives but because he sees in him something that makes him worthy of being the object of divine concern, that is, his faith in God. But it was not fitting that the one who had faith in God should remain among perverse people—the father of Abraham was in fact an idolater—because the company of the wicked often does harm to zealous people, especially to those whose zeal is new. That is why the Savior also proclaims, "If anyone wishes to follow me and does not hate his father, his brothers, his sisters, and even his wife and children, he cannot be my disciple." The Lord did not say that in order to provoke hatred of one's relatives, but if one of them becomes an obstacle to virtue, it is necessary to hate him for virtue's sake. That is what the apostles did, who said, "Look, we have left everything in order to follow you." Such is the order given now to the patriarch, and God tells him that he will show him a land in which to live, that he will make of him a great nation, that he will bless and magnify his name. — On Genesis Philoxenus of Mabbug : Abraham, who was called, went forth after God, and he was not a judge of the voice which came to him, and he was not held back by race and kinsfolk, nor by country and friends, nor by any of the many other human ties. Immediately he heard the voice and knew that it was of God, he despised everything and went forth to Him, and hearkened unto Him with simplicity. And he held Him to be certain and sure in his mind by faith, and by the natural simplicity which acteth not cunningly with evil things; and as a boy after his father did he run towards the voice of God, everything being despised in his eyes immediately he heard the word of God. And there was in him also the knowledge and discretion of nature, but he shewed his discernment in that he found it right to hearken unto God, Who had called him, as a servant to his lord, and as a slave to his Creator. And also to that knowledge in which he was placed he did not give power to investigate and to enquire why and for what reason he had been called by God, "Go forth from thy country, and from thy kinsfolk, and come to the land which I will show thee." And God did not reveal to him what the country was, in order that his faith might be the more victorious, and his simplicity appear. — 13 Ascetic Discourses, Discourse 4 -- On Faith: First Discourse on Simplicity