Romans 1:14

Paul says that he is under obligation to those whom he names, because he was sent for the purpose of preaching to everyone. For this reason he states that they are all under obligation to believe in God the Creator, from whom and through whom …

We can see how in a short time this religion has grown up, making progress through the persecution and death of its adherents and through their endurance of the confiscation of their property and every kind of torture. And this is particularly miraculous, since its teachers are themselves neither very skillful nor very numerous. But in spite of everything, the Word is now preached in all the world, so that "Greeks and barbarians, wise and foolish" now adopt the Christian faith.

Which also he said when writing to the Corinthians. And he says it, to ascribe the whole to God. (1 Cor. ix. 16.) And see him here also unassuming, for he does not say, that I may teach and instruct, but what? "that I might have some fruit." And not fruit, simply, but "some fruit." Again, depreciating his own share therein just as he had said above, "that I may impart some gift." And then to repress them too, as I said also before, he says, "even as among other Gentiles." For, I do not, because you are rich, and have the advantage of others, show less concern about the others. For it is not the rich that we are seeking, but the faithful. Where now are the wise of the Greeks, they that wear long beards and that are clad in open dress, and puff forth great words? All Greece and all barbarian lands has the tentmaker converted. But Plato, who is so cried up and carried about among them, coming a third time to Sicily with the bombast of those words of his, with his brilliant reputation, did not even get the better of a single king, but came off so wretchedly, as even to have lost his liberty. But this tentmaker ran over not Sicily alone or Italy, but the whole world; and while preaching too he desisted not from his art, but even then sewed skins, and superintended the workshop. And even this did not give offence to those who were born of consuls, and with very good reason, for it is not their trades and occupations, but falsehood and forged doctrines, which usually render teachers easy subjects of contempt. And for this reason, even Athenians still laugh at the former. But this man even barbarians attend to, and even foolish and ignorant men. For his preaching is set forth to all alike, it knows no distinction of rank, no preeminence of nation, no other thing of the sort; for faith alone does it require, and not reasonings. […]

And this is a matter of modesty. I, he says, am not bestowing some favor, but am fulfilling the command of the Master, and you should thank God, for He is the benefactor, while I am "obligated." He said the same thing to the Corinthians …

The other reason is the responsibility of his office: woe to me, if I do not preach the Gospel (1 Cor 9:16). And because he had undertaken the general apostolate of the gentiles, he asserts that he is under obligation to all: although I am …