John Chrysostom

"For whom He did foreknow, He also did predestinate to be conformed to the Image of His Son." See what superb honor! for what the Only-begotten was by Nature, this they also have become by grace. And still he was not satisfied with this calling of them conformed thereto, but even adds another point, "that He might be the first-born." And even here he does not come to a pause, but again after this he proceeds to mention another point, "Among many brethren." So wishing to use all means of setting the relationship in a clear light. …

Homily on Romans 15 ↗

Theophylact of Ohrid

God foreknows those worthy of the calling, then predestines them. Thus, first comes foreknowledge, then predestination. By predestination, understand the unchangeable good will of God. So He foreknew that Paul was worthy of the evangelical calling, and thus predestined, that is, unchangeably determined, and therefore resolved to call him. Those whom He foreknows to be worthy of the calling, He makes conformed to the image of His Son. …

Commentary on Romans ↗

Augustine of Hippo

There are some who think that in the resurrection all will be men and that women will lose their sex. This view springs from this text and Ephesians: "Until we all attain to perfect manhood." … For my part, I think that those who believe that there will be two sexes in the resurrection are more sensible.

City of God 19.22.17 ↗

Thomas Aquinas

Then he proves what he had said with the following proof, when he says, "for whom he foreknew." No one can harm those whom God advances; but God advances the predestined who love him. Therefore, nothing can harm them, but everything works for their good. First, therefore, he proves the minor premise, namely, that God advances them; second, the major, namely, that nothing can be harmful to those advanced by God, at "what shall we then say." In regard to the first he does two things. …

Commentary on Romans ↗