Ruth has come to find refuge under the wings of the Almighty, the promise-keeping God of Israel. In the providence of God we see that this refuge is modeled by Boaz, a godly and kind man who treats Ruth with acceptance and affection as he both provides for her and protects her. She is as shocked by this as are we, the readers! How is this possible? The answer can only be that Boaz is modeling the love and grace of God. He is extending unmerited, favorable acceptance to undeserving Ruth, and he is following it up with the generous gifts that such favorable acceptance always extends.
In the interaction between Boaz and Ruth we are treated to a glimpse of how God treats those who are privileged to know His redeeming grace, and come to find refuge under His wings.