For the book of Job, God is not just or merciful, yet he is also not unjust or cruel; instead God is—God. In the context of these various biblical positions, this statement is more than mere tautology, it is a critical position all its own. It is a striking statement, because it shows us that speaking of God was no easier in antiquity, with its mythically charged worldview, than it is for modern times.— Job's Journey, page 24
Amen and amen! Maybe the primary reason for including Job in the canon was to let people know that God is bigger than our concepts of him?