A.W. Tozer emphasizes that to truly please God, one must be an instrument for His use, much like household appliances that require an external power source to function. He illustrates that without the empowering presence of the Holy Spirit, even the most talented individuals in the church are ineffective in their roles. Tozer calls for a reliance not on natural gifts but on the dynamic power of God to energize and bless the work being done. He urges believers to seek effectiveness through surrendering to the Spirit's leading, rather than depending solely on their abilities. The sermon concludes with a prayer for deliverance from reliance on human gifts and a desire for God's power to flow through His people.