Chuck Smith emphasizes the theme of divine recompense in his sermon on Ruth 2:12, illustrating how God rewards our labor and faithfulness, assuring that no effort for Him is in vain. He highlights Ruth's journey from Moab to trusting in the God of Israel, showcasing her faith amidst adversity and the importance of seeking God's reward rather than human recognition. Smith draws parallels between God's protective nature and a mother hen, encouraging believers to trust in God's providence and shelter during life's storms.