John Chrysostom

"What shall we then say to these things?" As if he should say, Let me then hear no more about the dangers and the malicious devices from every quarter. For even if some disbelieve the things to come, still they have not a word to say against the good things that have already taken place; as, for instance, the friendship of God towards thee from the first, the justifying, the glory. And yet these things He gave thee by means seemingly distressing. …

Homily on Romans 15 ↗

Theophylact of Ohrid

Do you see that here he shows very clearly that he is speaking to those who are suffering? His speech is almost as follows: if we were deemed worthy of such blessings at the time when we were enemies, then how much greater blessings shall we be deemed worthy of after our justification and glorification? And if God is for us, who is against us? Even if the whole world were to rise against us, the wisdom of God will turn this uprising into our salvation and glory.

Commentary on Romans ↗

Thomas Aquinas

Then he clarifies the major premise, namely, that nothing can harm those advanced by God, when he says "what shall we then say." First, he shows that they cannot suffer any loss through the evil of punishment; second, nor through the evil of guilt, at "who will accuse" (Rom 8:33). The evil of punishment is twofold: one consists in the imposition of evils, the other in the removal of good things. …

Commentary on Romans ↗