It is when we hit rock bottom, and realize that we are nothing, we realize our perspective on God and on ourselves. In light of that, Isaiah showed the Israelites the mistakes of their grandparents, and how those behaviors were provoking God to put an end to their corruption in system, religion, spirit, and soul. Back then the Israelites had turned to idol worship which is spiritual idolatry. Today, we have idols though they may not necessarily be made of wood, metal, or some other material. When your devotion to a THING supersedes your devotion to God, THAT is your idol. Since the fear of the Lord is the beginning of wisdom, we need spiritual renewal, as it will provide us with the strength and wherewithal to get through life and whatever else it throws at us. We need to meet God on His terms, and He wants us to be strong, be able to stand, and be able to get through whatever comes against us.