There are many great themes woven throughout the book of Ruth: providence, redemption, grace, and even sin and judgment.
Ruth is a story of God in His providence using human sin to accomplish His best and grandest plan: the plan of redemption through Christ.
God demonstrates Himself to be a Savior by restoring the land from drought and famine to food production, by restoring Naomi from sin to repentance, and by converting Ruth from idolatry to salvation.
Ruth is a remarkable story of repentance and the spiritual restoration of God’s own, and the spiritual conversion of one of God’s enemies.
The book of Ruth teaches that salvation is desperately needed for all people, including both Orpah and Ruth.