The sermon centers on the call to introspection and obedience, drawing from the book of Haggai to urge listeners to examine their lives and align them with God's will. It highlights the importance of considering one's ways, worship, and potential wastefulness, illustrating how neglecting spiritual growth and obedience can lead to dissatisfaction and stagnation. Ultimately, the message encourages a responsive faith, modeled by the Israelites who, after receiving prophetic guidance, committed to rebuilding the temple and embracing God's leadership, demonstrating a posture of surrender and trust in His direction.