Matthew Henry on Job 36:1-4

Elihu only maintained that the affliction was sent for his trial; and lengthened because Job was not yet thoroughly humbled under it. He sought to ascribe righteousness to his Maker; to clear this truth, that God is righteous in all his ways. Such knowledge must be learned from the word and Spirit of God, for naturally we are estranged from it. The fitness of Elihu's discourse to the dispute between Job and his friends is plain. It pointed out to Job the true reason of those trials with which he had been pointed out to Job the true reason of those trials with which he had been visited. It taught that God had acted in mercy towards him, and the spiritual benefit he was to derive from them. It corrected the mistake of his friends, and showed that Job's calamities were for good.