"Having sufficiently proved that faith is necessary for all, he confirms this further by the example of Abraham, who enjoyed great honor among the Jews.
"He says that even Abraham, who accomplished many great things, was justified not by works, but by faith" (Blessed Theophylact).
The Apostle asks, but the question already proves his thought, for it contains the answer within itself.
"In the present place, the Apostle proves the power of faith by setting forth his argument in questions, as he is always accustomed to do for clarity and because of confidence in the truth of his words.
"He did this above, saying, 'What advantage then has the Jew?' and, 'What then? Do we have an advantage?' and again, 'Where then is boasting? It has been excluded.'
"So also here he says, 'What then shall we say?' and so forth" (Saint Chrysostom).
This question led the mind to the whole history of the forefather Abraham. It recalled how he was taken from his father's house, from his kindred, and from his land.
It recalled how he went and came to a land unknown at first, what trials he underwent there, and how after all this he received the promise of an innumerable posterity.
It also recalled the promise of the Descendant from Whom blessing would come to all nations. Anyone who passed through this whole history in thought could not fail to see what the forefather Abraham found, and how he found it.
Saint Chrysostom, Oecumenius, Gennadius, Photius in Oecumenius, and Theophylact connect the phrase "according to the flesh" with "father": "our father according to the flesh."
This combination fixes the whole thought on Abraham, as if saying: see what, how much, and how our progenitor Abraham found. Therefore imitate him.
"The Apostle shows Abraham special honor by calling him forefather, so as thereby to oblige the Jews to obey him in everything" (Saint Chrysostom), "so as to oblige them by this to imitate him in everything" (Blessed Theophylact).
The Apostle ascends to the time when the whole human race still stood on one level. There was no written law, and the path to justification was open in one way for all.
In the person of Abraham, both Judaism and what lay outside Judaism, which were to be formed in the future, were concentrated.
By pointing to him, the Apostle wishes "to open the path of kinship with him also to the Gentiles" (Saint Chrysostom).
At the same time, he suggests to the Jews whether it is possible to be content with mere descent from Abraham according to the flesh, when in Abraham's own case this descent had no significance.
Blessed Theodoret connects the phrase "according to the flesh" with "found": what did Abraham our father find according to the flesh?
By "flesh" one may understand human nature, or works performed visibly in the flesh and by the flesh according to the order under the law, such as circumcision, sacrifices, and the rest.
The thought will be: what did Abraham our father find by his natural powers? Or, did our forefather find anything by works visibly performed in the flesh and by the flesh, according to the order under the law?
Neither question can be answered affirmatively.
The first cannot, because everything in Abraham was according to God's good pleasure, not according to his merits.
The second cannot, because no such order yet existed, and circumcision served for him as the seal of distinctions granted to him before circumcision.
The Apostle's words also lead to another thought. What did a Jew encounter when he was born into the world?
He encountered the chosen people of God, to whom he belonged by birth. Receiving circumcision after eight days, he became heir of all the privileges of Israel.
Abraham encountered nothing of the kind when he was born into the world. Yet how he was magnified, and how he was visited with God's mercies.
Therefore there is a path to God's good pleasure apart from works of the law. Consider, then, what this is, so that you do not make a mistake by attributing too much importance to these privileges.