These chapters are at the heart of Job's final discourse and summary defense, but he speaks about greater matters than his own guilt or innocence. He speaks of the nature of true wisdom and concludes that it consists in the fear of the Lord. He contrasts his previous life to his present affliction in a way that prophetically anticipates the condescension of Christ.
Job's Discourse on Wisdom (Chapter 28) Verses 1-11 picture the insatiable quest for riches. Men risk their lives and even move mountains in search of the treasure of the earth, but the greater treasure of true wisdom eludes them. Men do not know the value of wisdom, much less do they know where to look for it (vs.12-19). Only God, the Author of wisdom, understands its way and knows its place (v.23). Among His greatest works was the preparation and revelation of true wisdom, which is to fear the Lord and depart from evil (vs. 26-28).
Job's Exaltation and Humiliation (Chapters 29 and 30) Here Job compares his exalted past to his lowly present. In his exalted days he was given every honor and enjoyed every blessing; his righteousness and glory were on display, and he ruled like a king. But now he suffers every indignity. He is taunted, reviled, and afflicted in every way. Job's contrasting conditions of exaltation and humiliation are described in unmistakeably messianic terms. His experience was a living prophecy of the condescension of Christ from a state of glory to a state of humility. Phil 2:5-8