Cyril of Alexandria

The divine is invisible in nature. "For no one has ever seen God," as it is written. But God can be seen by the eyes of faith from those things that happen without explanation and beyond speech. For the invisible things, since the foundation of the world, are clearly understood by the things that are made, that is, his heavenly power and godhead. …

Commentary On Isaiah 5:5.64:4-5 ↗

Jerome

From ages past no one has heard, no ear has perceived, no eye has seen any God besides you, who works for those who wait for him. You meet those who rejoice in doing righteousness, who remember you in your ways. (LXX: From ages past no one has heard, no eye has seen any God besides you, who works for those who wait for him, and the works that you will do for those who hope for mercy. …

Commentary on Isaiah ↗

Hilary of Poitiers

But it may be argued that the Apostle was not inspired by the Spirit of prophecy when he borrowed these prophetic words; that he was only interpreting at random the words of another man, and though, no doubt, everything the Apostle says of himself comes to him by revelation from Christ, yet his knowledge of the words of Isaiah is only derived from the book. …

On The Trinity 5:33 ↗

Thomas Aquinas

In benefits, he sets out the greatness of his benefits: "from the beginning of the world they have not heard," for never has anything been seen or heard, like what God did for the Jews, and will do for the saints in glory: "eye has not seen, nor ear heard: neither has it entered into the heart of man, what things God has prepared for them that love him" (1 Cor 2:9). 1120. …

Commentary on Isaiah ↗