John Chrysostom

"How then shall they call on Him in Whom they have not believed? and how shall they believe in Him of Whom they have not heard? and how shall they hear without a preacher? and how shall they preach except they be sent? as it is written." Here again he takes from them all excuse. …

Homily on Romans 18 ↗

Theophylact of Ohrid

He said above that everyone who calls on the name of the Lord will be saved. Now he reproaches the Jews for not having called on the name of the Lord. Why then did they not call? Because they did not believe. And why did they not believe? Was it because they had not heard? No, they heard. Then the objection: how could they hear without a preacher?

Commentary on Romans ↗

Clement of Alexandria

"Lord, who hath believed our report?" Isaiah says. For "faith cometh by hearing, and hearing by the word of God," saith the apostle. "How then shall they call on Him in whom they have not believed? And how shall they believe on Him whom they have not heard? And how shall they hear without a preacher? And how shall they preach except they be sent? …

The Stromata Book 2 ↗

Augustine of Hippo

God sends his angels and gathers together his elect from the four winds, that is, from the whole world. Therefore, the church must necessarily be found among the nations where it does not yet exist, but it does not necessarily follow that all who live there will believe. The promise was to all nations but not to all men of all nations, for not all have faith.

Letter 199.48 ↗

Thomas Aquinas

Then when he says, how then shall they call on him, he presents the order in which one is called to salvation, which is from faith. In regard to this he does two things: first, he shows that the later steps in this order cannot occur without the earlier; second, he shows that after the earlier steps have been taken, the later do not necessarily follow, at but all do not obey the Gospel. …

Commentary on Romans ↗