"The book of Job is about the physical and spiritual experience of a believer of long ago whose faith was tested to the utmost. Its main purpose is not to teach Israelite history, nor to reveal Messianic prophecy, nor to show the necessary steps for salvation, nor to disclose the mission of the church. The underlying message of Job demonstrates that ‘Who God is determines what He does, therefore, we must trust Him without reservation.’ God always knows what he is doing and why. Our task is to ‘walk by faith, not by sight’ (2 Cor. 5:7)."
Gareth Crossley, The Old Testament Explained and Applied (Darlington: Evangelical Press, 2002), 439.