John Chrysostom

I Am aware that to most what is here said is a difficulty. And therefore I must first give the subject of the whole of this passage, and what he wishes to correct in writing this. What does he wish to correct then? There were many of the Jews which believed, who adhered of conscience to the Law, and after their believing, still kept to the observance of meats, as not having courage yet to quit the service of the Law entirely. …

Homily on Romans 25 ↗

Theophylact of Ohrid

Many of the Jews who had believed, even after their conversion, observed distinctions in foods, abstained from pork, and did not dare to depart entirely from the law. Then, lest they be exposed as abstaining from pork alone, they abstained from all meat in general and ate only vegetables. Others were more mature, observed nothing of the sort, and were reproached by those who did observe such things. Paul feared that the mature, by rebuking the immature untimely and improperly, might turn them away from the faith of Christ. …

Commentary on Romans ↗

Cyprian

But what a thing it is, to assert and contend that they who are not born in the Church can be the sons of God! For the blessed apostle sets forth and proves that baptism is that wherein the old man dies and the new man is born, saying, "He saved us by the washing of regeneration." But if regeneration is in the washing, that is, in baptism, how can heresy, which is not the spouse of Christ, generate sons to God by Christ? …

Epistle LXXIII ↗

Thomas Aquinas

After showing how one ought to become perfect, the Apostle now shows how the perfect should act toward the imperfect. First, he shows that they ought not scandalize or judge them; second, that they ought to uphold them, at we that are stronger (Rom 15:1). In regard to the first he does two things: first, he forbids improper judgments; second, he forbids placing stumbling blocks before the weak, at but judge this rather (Rom 14:13). …

Commentary on Romans ↗