Peter continues his emphasis on voluntary subjection. In chapter three he turns his attention to the relationship between husbands and wives. He finishes the passage with a promise of God’s blessing: the goal of the submissive life.
Strictly speaking spiritual renewal doesn’t follow any strict formula. It’s a work of God’s grace and, as such, is entirely dependent upon Him. Still, if we are willing to recognize our need for spiritual renewal, then we can take conscious steps in that direction. God, as it happens, loves to move in the lives of people who are earnestly seeking Him.