John Chrysostom

But why then did Christ come? Did He not know that they would not believe in Him? Yes: the Prophets had prohibited this very unbelief, and He came that it might be made manifest, to their confusion and condemnation; That the saying of Esaias the prophet might be fulfilled, which He spake, Lord, who hath believed our report? and to whom hath the arm of the Lord been revealed? (Hom. lxviii. 2) That the saying of Esaias might be fulfilled: that here is expressive not of the cause, but of the event. …

Catena Aurea by Aquinas ↗

Theophylact of Ohrid

In the words "they did not believe in Him, that the word of Isaiah might be fulfilled," what is expressed is not the cause, but the event. For they did not disbelieve in Christ because Isaiah had foretold it about them, but the prophet foretold it about them because they would not believe. Let us also examine the words of Isaiah: "Lord, who has believed our report?" (Isa. 53:1). …

Commentary on John ↗

Augustine of Hippo

"But though He had done so many miracles before them, yet they believed not on Him: that the saying of Isaiah the prophet might be fulfilled, which he spake, Lord, who hath believed our report and to whom hath the arm of the Lord been revealed?" Where he makes it sufficiently plain that the Son of God is Himself the arm of the Lord; not that the person of God the Father is determined by the shape of human flesh, and that the Son is attached to Him as a member of His body; but because all things were made by Him, and therefore He is …

Tractates on John 53 ↗

Thomas Aquinas

Then, the testimony of the prophet on this point is cited. First, the prophecies are mentioned; secondly, it is shown that they refer to Christ (v 41). He does two things about the first: he cites the prophecy foretelling their unbelief; secondly, he adds the prophecy foretelling the reason for their unbelief (v 39). He says: I say that they did not believe in him that the word spoken by the prophet Isaiah might be fulfilled. …

Commentary on John ↗

Bonaventure

That the word of Isaiah the Prophet might be fulfilled, which he spoke: Lord, who has believed: as if to say: few, or none: our report? That is, that which we have heard from the Lord: or that which one hears from us prophesying, because "faith comes from hearing," Romans 10. And the arm of the Lord, to whom has it been revealed? The arm of the Lord, as Augustine says, is the Son of the Father. "For just as your arm is that by which you work, so the arm of God is called the Word, by which he made the world. …

Commentary on John, Chapter 12 ↗