It is a paradox that only God can resolve. It is of interest that at the beginning of the book God granted Satan two audiences concerning Job and now at the end of the book Job is granted two audiences with God to discuss the problem of evil. In these audiences God will speak cryptically of Stan and evil. The point is not to reveal Satan to Job but to enable Job to deal with the concepts of evil as it exists under the sovereign reign and constraints of God. I. Job is Humiliated by God Revealing Job's Inadequacies Concerning the Physical Universe .
Humans are too frail and limited to know the difference.
Satan was in the strong wind but Yahweh was in the violent storm. The idea is that if a king were to ask Job for advice then the advice in the council chamber would be darkness. But, it must be remembered that Semitic people think in the comparative more often than western thinkers. The comparison is truth versus Job's words. Later when God compares Job to his friends he is said to have spoken what was right.