Adam Clarke on Job 42:3

Who is he that hideth counsel - These are the words of Job, and they are a repetition of what Jehovah said, Job 38:2 : "Who is this that darkeneth counsel by words without knowledge?" Job now having heard the Almighty's speech, and having received his reproof, echoes back his words: "Who is he that hideth counsel without knowledge Alas, I am the man; I have uttered what I understood not; things too wonderful for me, that I knew not. God had said, Job 38:3 : "Gird up now thy loins like a man; I will demand of thee, and answer thou me." In allusion to this, Job exclaims to his Maker, Job 42:4 : "Hear, I beseech thee, and I will speak: I will ask of Thee, and declare Thou unto Me." I acknowledge my ignorance; I confess my foolishness and presumption; I am ashamed of my conduct; I lament my imperfections; I implore thy mercy; and beg thee to show me thy will, that I may ever think, speak, and do, what is pleasing in thy sight.

Things too wonderful - I have spoken of thy judgments, which I did not comprehend.