Charles Ellicott Commentary Job 21:4

"As for me, is my complaint to man? And why should I not be impatient?" — Job 21:4 (ASV)

Is my complaint to man? —“It is not to man that I complain. I do not ask for your sympathy, and therefore, why should you resent an offense that is not given? If, however, I did ask it, might not my spirit with good reason be impatient? But, on the contrary, my complaint is to God; and, concerning the ways of God, I venture to ask why it is that His justice is so delayed; and this is a problem that, when I remember it, I am troubled, and horror takes hold of my flesh, as it is so difficult and arduous.”