Commentaries:
There is no doubt that prosperity is good, but unless one is sufficiently focused in the right direction and disciplined enough, it can also be a demanding master because of its power to distract one into idolatry.
John W. Ritenbaugh
Laodiceanism and Being There Next Year
Think of this in its metaphorical, spiritual intent. When God comes into our lives, He begins to bless us. He will bless us in ways that we have not been blessed before. The Israelites in this situation were not blessed with the liberties and the prosperity that true liberty could bring. Their blessings and prosperity were going to be physical, and thus, God is using physical examples of how blessings will come into their lives.
Now what about those that come into our lives? Sometimes the blessings will be physical to some of us, and perhaps prosperity will come, but the main thing that He wants with us is the relationship between us and Him. He is looking for it to grow and develop until we are blessed spiritually by becoming like Him, allowing Him to create Himself in us so that we reveal to Him and to others His characteristics in our lives. He is telling us that blessings like these will come.
John W. Ritenbaugh
New Covenant Priesthood (Part Three)