Gregory the Dialogist

Who will tell Him the things which I say? Even if a man shall speak, he shall be swallowed up. As if he plainly said; The unheard truths which I declare to Him, from an acute sense of His praises, who can repeat, even after he has heard them? But because, when learning and arrogance contend together in the habitation of the same mind, there sounds forth from the mouth of the speaker not merely levity of behaviour, but also gravity of sentiment; after Eliu had been puffed up in levity by arrogance, saying, Who will tell Him the things …

Morals on the Book of Job, Book XXVII ↗

Thomas Aquinas

Since he had spoken many times about the divine effects, lest this be imputed to him from presumption as though he thought that he knew perfectly these things, he disclaims this saying, "Who will tell him what I am saying?" as if he says: No one can sufficiently tell these things which I said to you about his effects. It befits him alone because of the excellence of his power. …

Commentary on Job ↗