Romans 4:3

Abraham, styled “the friend,” 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 thee out from thy country, and from thy kindred, and from thy father’s house, into the land which I shall show thee. And I will make thee a great nation, and will bless thee, and make thy name great, and thou shall be blessed. And I will bless them that bless thee, and curse them that curse thee; and in thee shall all the families of the earth be blessed.” And again, on his departing from Lot, God said to him. …

3. And teaching this very thing, He said to the Jews: “Your father Abraham rejoiced that he should see my day; and he saw it, and was glad.” What is intended? “Abraham believed God, and it was imputed unto him for righteousness.” In the first place, [he believed] that He was the maker of heaven and earth, the only God; and in the next place, that He would make his seed as the stars of heaven. This is what is meant by Paul, [when he says,] “as lights in the world.” Righteously, therefore, having left his earthly kindred, he followed the Word of God, walking as a pilgrim with the Word, that he might [afterwards] have his abode with the Word.

1. Vain, too, is [the effort of] Marcion and his followers when they [seek to] exclude Abraham from the inheritance, to whom the Spirit through many men, and now by Paul, bears witness, that “he believed God, and it was imputed unto him for righteousness.” And the Lord [also bears witness to him,] in the first place, indeed, by raising up children to him from the stones, and making his seed as the stars of heaven, saying, “They shall come from the east and from the west, from the north and from the south, and shall recline with Abraham, and Isaac, and Jacob in the kingdom of heaven;” and then again by saying to the Jews, “When ye shall see Abraham, and Isaac, and Jacob, and all the prophets in the kingdom of heaven, but you yourselves cast out.” This, then, is a clear point, that those who disallow his salvation, and frame the idea of another God besides Him who made the promise to Abrah …

For, in fine, the agreement and harmony of the faith of both contribute to one end, salvation. We have in the apostle an unerring witness: “For I desire to see you, that I may impart unto you some spiritual gift, in order that ye may be strengthened; that is, that I may be comforted in you, by the mutual faith of you and me.” And further on again he adds, “The righteousness of God is revealed from faith to faith.” The apostle, then, manifestly announces a twofold faith, or rather one which admits of growth and perfection; for the common faith lies beneath as a foundation. To those, therefore, who desire to be healed, and are moved by faith, He added, “Thy faith hath saved thee.” But that which is excellently built upon is consummated in the believer, and is again perfected by the faith which results from instruction and the word, in order to the performance of the commandments. …

For that investigation, which accords with faith, which builds, on the foundation of faith, the august knowledge of the truth, we know to be the best. Now we know that neither things which are clear are made subjects of investigation, such as if it is day, while it is day; nor things unknown, and never destined to become clear, as whether the stars are even or odd in number; nor things convertible; and those are so which can be said equally by those who take the opposite side, as if what is in the womb is a living creature or not. A fourth mode is, when, from either side of those, there is advanced an unanswerable and irrefragable argument. If, then, the ground of inquiry, according to all of these modes, is removed, faith is established. …

Accordingly it is patience which is both subsequent and antecedent to faith. In short, Abraham believed God, and was accredited by Him with righteousness; but it was patience which proved his faith, when he was bidden to immolate his son, with a view to (I would not say the temptation, but) the typical attestation of his faith. But God knew whom He had accredited with righteousness. So heavy a precept, the perfect execution whereof was not even pleasing to the Lord, he patiently both heard, and (if God had willed) would have fulfilled. …

Abraham, styled “the friend,” 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 thee out from thy country, and from thy kindred, and from thy father’s house, into the land which I shall show thee. And I will make thee a great nation, and will bless thee, and make thy name great, and thou shalt be blessed. …

The word of the Lord came to Abraham in a vision also. For when God promised him protection and exceeding great reward, he, being solicitous about posterity, said that a certain Eliezer of Damascus, born in his house, would be his heir. Immediately he was promised an heir, not that house-born servant, but one who was to come forth of Abraham himself; and again a seed innumerable, not as the dust of the earth, but as the stars of heaven, which rather seems to me a promise of a posterity exalted in celestial felicity. For, so far as multitude is concerned, what are the stars of heaven to the dust of the earth, unless one should say the comparison is like inasmuch as the stars also cannot be numbered? For it is not to be believed that all of them can be seen. For the more keenly one observes them, the more does he see. …

5. I have already given what I considered a sufficient answer to Faustus’ calumnies of the lives of the patriarchs. That they were punished at their death, or that they were justified after the Lord’s passion, is not what we learn from His commendation of them, when He admonished the Jews that, if they were Abraham’s children, they should do the works of Abraham, and said that Abraham desired to see His day, and was glad when he saw it; and that it was into his bosom, that is, some deep recess of blissful repose, that the angels carried the poor sufferer who was despised by the proud rich man. …

Chapter 24. 32. And if any one seek for divine authority in this matter, though what is held by the whole Church, and that not as instituted by Councils, but as a matter of invariable custom, is rightly held to have been handed down by apostolical authority, still we can form a true conjecture of the value of the sacrament of baptism in the case of infants, from the parallel of circumcision, which was received by God’s earlier people, and before receiving which Abraham was justified, as Cornelius also was enriched with the gift of the Holy Spirit before he was baptized. …

33. Further, even if we should desire to prove you to be slayers of the prophets, it would be too long a task to collect the evidence through all the several instances of the slaughter which your infuriated leaders of the Circumcelliones, and the actual crowd of men inflamed by wine and madness, not only have committed since the beginning of your schism, but even continue to commit at the present time. To take the case nearest at hand. Let the divine utterances be produced, which are commonly in the hands of both of us. Let us consider those to be murderers of the prophets whom we find contradicting the words of the prophets. What more learned definition could be given? What could admit of speedier proof? You would be acting less cruelly in piercing the bodies of the prophets with a sword, than in endeavoring to destroy the words of the prophets with your tongue. …

Attend now to the point which we have laid down for discussion: whether faith is in our own power? We now speak of that faith which we employ when we believe anything, not that which we give when we make a promise; for this too is called faith . We use the word in one sense when we say, “He had no faith in me,” and in another sense when we say, “He did not keep faith with me.” The one phrase means, “He did not believe what I said;” the other, “He did not do what he promised.” According to the faith by which we believe, we are faithful to God; but according to that whereby a thing is brought to pass which is promised, God Himself even is faithful to us; for the apostle declares, “God is faithful, who will not suffer you to be tempted above that ye are able.” Well, now, the former is the faith about which we inquire, Whether it be in our power? even the faith by which we believe God, or be …