Considered both a theological and a literary masterpiece, the book of Job is an honest portrayal of God allowing a good man to suffer. The test of Job's faith, allowed by God in response to a challenge from Satan, revealed God's loving sovereignty and the supremacy of divine wisdom over human wisdom (personified by Job's friends). Believing that God is good despite the apparent evidence to the contrary, Job rested in faith alone. In the depths of agony he could still proclaim, "I know that my Redeemer lives" (19:25). In the end God silenced all discussion with the truth that he alone is wise (chs. 38-41). Yet he vindicated Job's trust in him (ch. 42), proving that genuine faith cannot be destroyed. The unknown author was probably an Israelite writing sometime between 1500 and 500 b.c.