T. Austin-Sparks emphasizes the importance of persistent faith through the story of Elijah on Mount Carmel, where despite the initial lack of rain after a great victory over Baal, Elijah continues to pray earnestly. He illustrates that God's ways can seem slow and hidden, testing the faith of His servants, and that true service requires unwavering persistence even in the face of disappointment. The narrative highlights the necessity of continuing to seek God's response, as demonstrated by Elijah's servant who returned multiple times to report 'nothing' before finally seeing a sign of rain. This persistence ultimately leads to the fulfillment of God's promise, showcasing that faith must endure through trials and delays. The sermon concludes with the reminder that true victory in faith comes from steadfastness and trust in God's timing.