The rollercoaster of the book of Ruth is accelerating toward the exciting conclusion. Chapter four focuses in on the character of Boaz as he takes on the role of kinsman-redeemer. The story puts the focus on the idea "keep trusting." As Boaz takes action to redeem Ruth, he keeps his trust in God. He refuses sneaky, underhanded ways to ensure that he got what he wanted, i.e. Ruth's hand in marriage. He did the right thing and God rewarded him.
There are a few cultural oddities in Ruth 4. These are explained in the message and in a skit that dramatizes the action of Ruth 4:1-12.