In the final message of the Ruth series, Dr. Smith emphasizes that while the story is captivating, its primary purpose is to point to God's universal plan of redemption for mankind. He cautions against focusing solely on the individual truths within the story and missing the overarching message. Dr. Smith highlights key facts from the book of Ruth, including its setting during the time of the judges, a period of moral chaos, the focus on bloodline and the kinsman redeemer, and the inclusion of a Moabite, Ruth, into the Israelite lineage. He explains that Ruth's inclusion demonstrates that grace operates above the law, foreshadowing the salvation available to all through Jesus Christ, regardless of background. Ruth's faith, repentance, and obedience allowed God to overcome the curse associated with her people, illustrating the gospel message.