This sermon examines the parables of the growing seed and the mustard seed to illustrate the sovereign agency of God in the expansion of His kingdom. The central message emphasizes that spiritual growth is a monergistic work of the Holy Spirit, independent of human effort, ensuring that the church grows despite worldly opposition or apparent stagnation. By contrasting the farmer's limited role with God's automatic power, the text highlights the assurance that God builds His house and that the gates of hell cannot prevail against it. The discussion further explores the purpose of parables as both a means of revelation for the elect and a judgment for the unregenerate, underscoring the necessity of divine grace for understanding and salvation. Ultimately, the sermon encourages believers to trust in God's faithfulness to bring about the final harvest and to remain steadfast in their faith, knowing that any fruit in their lives is evidence of God's transformative work.