17 (As it is written, I have made thee a father of many nations,) before him whom he believed, even God, who quickeneth the dead, and calleth those things which be not as though they were.
For He had compassion on us, and mercifully saved us, observing the many errors in which we were entangled, as well as the destruction to which we were exposed, and that we had no hope of salvation except it came to us from Him. For He called us when we were not, and willed that out of nothing we should attain a real existence.
The dead here are those whose souls have sinned, for Scripture says: “The soul that sins will die.” For just as the senses perish in our mortal body so that the body can no longer hear, smell, taste or touch, so also the spiritual senses perish in the soul so that it cannot see God or hear his Word, or sense the sweet odor of Christ, or taste the good Word of God, or handle the word of life. People like that must be said to be dead. This is what we were like when Christ came, but he has given us life by his grace.
Paul confirms by quoting the law that Abraham is the father of all who believe, and so the promise is firm if they abandon the law on account of their faith, because the promise of the kingdom of heaven is given to the righteous, not to sinners. Those who are under the law are under sin because all have sinned, and it is not possible for anyone who is under the law to receive grace.In order to teach that there is one God for all, Paul tells the Gentiles that Abraham believed in God himself and was justified in his sight. The Gentiles also believe in him that they may be justified, and so there is no difference between Jew and Greek in faith, for when the circumcision and the uncircumcision are taken away they are made one in Christ.
Paul invites the Gentiles to share the faith of Abraham, who believed God while he was still uncircumcised. Now that that faith is preached in Christ, he has been raised from the dead, along with his wife. For when they were already very old they sprang back to life, so that Abraham did not doubt that he would have a son by Sarah, whom he knew to be sterile and who had long since ceased to have her menstrual period. Paul said this so that they would not worry about circumcision or uncircumcision but that they would respond eagerly because of their faith, secure in the knowledge that the one in whom they believe is no other than the one who gives life to the dead, who has the power to bring things which do not exist into being by his will.
Do you observe that this was ordered by Providence from of old? What then, he means, does He say this on account of the Ishmaelites, or of the Amalekites, or of the Hagarenes? This however, as he goes on he proves more distinctly not to be said of these. But as yet he presses forward to another point, by which means he proves this very thing by defining the mode of the relationship, and establishing it with a vast reach of mind. What then does he say?
"Before (or, answering to, κατέναντι]) Him Whom he believed, even God."
But his meaning is something of this sort, as God is not the God of a part, but the Father of all, so is he also. And again, as God is a father not by way of the relationship of nature, but by way of the affiance of faith, so is he also inasmuch as it is obedience that makes him father of us all. For since they thought nothing of this relationship, as clinging to that grosser one, he shows that this is the truer relationship by lifting his discourse up to God. And along with this he makes it plain that this was the reward of faith that he received. Consequently, if it were not so, and he were the father of all the dwellers upon earth, the expression before (or answering to) would be out of place, while the gift of God would be curtailed. For the "before," is equivalent to "alike with." Since where is the marvel, pray, in a man's being the father of those sprung from himself? This is what is every man's lot. But the extraordinary thing is, that those whom by nature he had not, them he received by the gift of God. And so if you would believe that the patriarch was honored, believe that he is the father of all. But after saying, "before Him Whom he believed, even God," he does not pause here, but goes on thus; "Who quickens the dead, and calls those things which be not as though they were," so laying beforehand his foundations for discoursing upon the resurrection. And it was serviceable also to his present purpose. For if He could "quicken the dead" and bring in "those things that were not as though they were," then could He also make those who were not born of him to be his children. And this is why he does not say, bringing in the things which are not, but calling them, so showing the greater ease of it. For as it is easy to us to call the things which are by name, so to Him it is easy, yea, and much easier to give a subsistence to things that are not. But after saying, that the gift of God was great and unspeakable, and having discoursed concerning His power, he shows farther that Abraham's faith was deserving of the gift, that you may not suppose him to have been honored without reason. And after raising the attention of his hearers to prevent the Jew from clamoring and making doubts, and saying, "And how is it possible for those who are not children to become children?" he passes on to speak of the patriarch, and says, (Romans 4:18)
Is God here referring to the fact that Abraham was the father of the Ishmaelites, or the Amalekites, or the Hagarenes? No … God is a father not by way of natural relationship but by way of the relation of faith. It is in this sense also that Abraham is the father of us all.
Abraham is the father of all believers, not just of the nation of Israel. “Life to the dead” is given to those who are dead for the purpose of bearing children, which is the context of the present discussion.
Everything which God did not beget of himself but made through his Word he made not out of things which already existed but out of what did not exist at all, i.e., out of nothing.
[AD 140] Pseudo-Clement on Romans 4:17