Moses quickly reminds the people that it isn't because they are good or worthy, but because the other nations are so wicked. Moses then goes on to remind the people of the many ways they have not been faithful or obedient.
When we are at the end of one chapter of our lives and about to open the door to the next, is our faith and trust really in God for the opportunities that might be there? There was a richness in the promised land but great danger; the Israelites operating in their own strength would easily be overcome. Only as they trusted God and gave Him the credit would they know the full joy that could be theirs. Their history of faithfulness was not good, yet God for His own name's sake demonstrated His goodness toward the people so that all nations would know the character of God and turn toward Him.
As I currently sit at my own precipice facing the prospect of both danger and richness undertaking a new project, I recognize that my blessing is not earned. I am not worthy of God's favor. I fail Him it seems daily. It is for His own name's sake that He goes before me and demonstrates His character to both me and the oeople all around so that no one can doubt that it was the hand of God who accomplished this.
When I consider Christian friends who when asked "how are you?" respond "I am blessed", I wonder if they understand how blessed they really are. Do they really appreciate that God provides for them not because of their faithfulness but because of the wickedness all around and God's desire to be known of all men? Their blessing is a witness to the world, not a reward for their goodness. If God has blessed you, how will that blessing be a witness to the believers and the unbelievers all around you.
Our purpose is to proclaim the glory of God. his blessings give us the object lessons needed to give Him attribution and recognize our great position. Unworthy but blessed.
May God richly bless you as you seek Him and as you serve Him.