Thomas Aquinas

In his discourse Eliphaz proposed two changes against Job. First, that he had been punished because of his very great evil. Second, that he had doubted or even denied divine providence. Now men are often saddened when any charges are falsely made against them, and so since Job did not see these things in himself he says, "Now also my speech is bitter," as if to say: As you saddened me above with your reproaches, so you do even now so I am compelled to speak with bitterness. …

Commentary on Job ↗