Genesis 26:4

“Observe, too, how the same promises are made to Isaac and to Jacob. For thus He speaks to Isaac: ‘And in thy seed shall all the nations of the earth be blessed.’ And to Jacob: ‘And in thee and in thy seed shall all families of the earth be blessed.’ He says that neither to Esau nor to Reuben, nor to any other; only to those of whom the Christ should arise, according to the dispensation, through the Virgin Mary. But if you would consider the blessing of Judah, you would perceive what I say. For the seed is divided from Jacob, and comes down through Judah, and Phares, and Jesse, and David. …

19. Could I therefore maintain opposition to my colleagues, and by resisting them stand in the way of such conquests of the Lord, and prevent the sheep of Christ which were wandering on your mountains and hills, that is, on the swellings of your pride, from being gathered into the fold of peace, in which there is one flock and one Shepherd? Was it my duty to obstruct these measures, in order, forsooth, that you might not lose what you call your own, and might without fear rob Christ of what is His: that you might frame your testaments according to Roman law, and might by calumnious accusations break the Testament made with the sanction of Divine law to the fathers, in which it was written, “In thy seed shall all the nations of the earth be blessed”: that you might have freedom in your transactions in the way of buying and selling, and might be emboldened to divide and claim as your own t …

3. If, however, love of men still keeps some secretly alienated from the flock of Christ, while fear of other men constrains them to a feigned reconciliation, I charge all such to consider that before God the conscience of man has no covering, and that they can neither impose on Him as a Witness, nor escape from Him as a Judge. But if, by reason of anxiety as to their own salvation, anything as to the question of the unity of Christ’s flock perplex them, let them make this demand upon themselves, and it seems to me a most just demand, that in regard to the Catholic Church, i.e. the Church spread abroad over the whole world, they believe rather the words of Divine Scripture than the calumnies of human tongues. …

Isaac also received such an oracle as his father had often received. Of this oracle it is thus written: “And there was a famine over the land, beside the first famine that was in the days of Abraham. And Isaac went unto Abimelech king of the Philistines unto Gerar. And the Lord appeared unto him, and said, Go not down into Egypt; but dwell in the land which I shall tell thee of. And abide in this land, and I will be with thee, and will bless thee: unto thee and unto thy seed I will give all this land; and I will establish mine oath, which I sware unto Abraham thy father: and I will multiply thy seed as the stars of heaven, and will give unto thy seed all this land: and in thy seed shall all the nations of the earth be blessed; because that Abraham thy father obeyed my voice, and kept my precepts, my commandments, my righteousness, and my laws.” This patriarch neither had another wife, no …

41. Besides this wonderful agreement between the types and the things typified, the adversary may be convinced by plain prophetic intimations, such as this: "In thy seed shall all nations be blessed." This was said to Abraham, and again to Isaac, and again to Jacob. Hence the significance of the words "I am the God of Abraham, and Isaac, and Jacob." God fulfills His promise to their seed in blessing all nations. With a like significance, Abraham himself, when he made his servant swear, told him to put his hand under his thigh; for he knew that thence would come the flesh of Christ, in whom we have now, not the promise of blessing to all nations, but the promise fulfilled.

5. Whether Cæcilianus was ordained by men who had delivered up the sacred books, I do not know. I did not see it, I heard it only from his enemies. It is not declared to me in the law of God, or in the utterances of the prophets, or in the holy poetry of the Psalms, or in the writings of any one of Christ’s apostles, or in the eloquence of Christ Himself. But the evidence of all the several scriptures with one accord proclaims the Church spread abroad throughout the world, with which the faction of Donatus does not hold communion. …

39. Moreover, to whom should it not seem strange that those worshippers, now become few in number, of deities both numerous and false, should refuse to do homage to Him of whom, when the question is put to them as to what deity He is; they dare not at least assert, whatever answer they may think to give, that He is no God at all? For if they deny His deity, they are very easily refuted by His works, both in prophecy and in fulfilment. I do not speak of those works which they deem themselves at liberty not to credit, such as His work in the beginning, when He made heaven and earth, and all that is in them. Neither do I specify here those events which carry us back into the remotest antiquity, such as the translation of Enoch, the destruction of the impious by the flood, and the saving of righteous Noah and his house from the deluge, by means of the [ark of] wood. …

21. But whoso forsaketh unity, violateth charity; and whosoever violateth charity, how great gifts soever he have, he is nothing. “If he speak with the tongues of men and of angels; if he knew all mysteries, if he have all faith, so as to remove mountains, if he distribute all his goods to the poor, if he give his body to be burned, and have not charity; it is nothing; it profiteth him nothing.” He possesseth all things to no useful end, who hath not that one thing by which he may use all these things well. So then let us embrace charity, “studying to keep the unity of the Spirit in the bond of peace.” Let not those seduce us who understand the Scriptures in a carnal manner, and who in making a bodily separation, are separated themselves by a spiritual sacrilege from the good corn of the Church which is spread over the whole world. …

20. “He stretcheth forth His hand in requiting” ( ver. 20 ). “They have polluted His Testament.” Read the testament which they have polluted: “In thy seed shall be blessed all nations.” Thou against these words of the Testator sayest what? The Africa of holy Donatus hath alone deserved this grace, in him hath remained the Church of Christ. Say at least the Church of Donatus. Wherefore addest thou, of Christ? Of whom it is said, “In thy seed shall be blessed all nations.” After Donatus wilt thou go? Set aside Christ, and then secede. See therefore what followeth: “They have polluted His Testament.” What Testament? To Abraham have been spoken the promises, and to his seed. The Apostle saith, “Nevertheless, a man’s testament confirmed no one maketh void, or super-addeth to: to Abraham have been spoken the promises, and to his seed. …

75. “They that fear Thee,” he saith, “will see me, and be glad” ( ver. 74 ): or, as other copies have it, “will be joyful: because I have hoped in Thy word:” that is, in the things which Thou hast promised, that they may be the sons of promise, the seed of Abraham, in whom all nations are blessed. Who are they who fear God, and whom will they see and be glad, because he hath put his trust in the word of God? Whether it be the body of Christ, that is, the Church, whose words these are through Christ, or within it, and concerning it, these are as it were the words of Christ concerning Himself; are not they themselves among those who fear God?…The same persons, who see the Church and are glad, are the Church. …

How on the Gentiles? It is said, “In thy seed shall all the nations of the earth be blessed:” ( Gen. xxii. 18; xxvi. 4 .) that is to say, in Christ. If this were said of the Jews, how would it be reasonable that they who were themselves subject to the curse, on account of transgression, should become the authors of a blessing to others? an accursed person cannot impart to others that blessing of which he is himself deprived. Plainly then it all refers to Christ who was the Seed of Abraham, and through whom the Gentiles are blessed. And thus the promise of the Spirit is added, as Paul himself declares, “that we might receive the promise of the Spirit through faith.” As the grace of the Spirit could not possibly descend on the graceless and offending, they are first blessed the curse having been removed; then being justified by faith, they draw unto themselves the grace of the Spirit. …