T. Austin-Sparks emphasizes the theme of spirituality in his sermon, addressing the spiritual immaturity of the Corinthian church as a significant issue. He explains that true spirituality is characterized by being governed by the Holy Spirit, contrasting it with carnality, which hinders spiritual growth. Sparks identifies several marks of carnality, including reliance on natural wisdom, selectiveness based on personal preferences, and a lack of moral sensibility, all of which prevent believers from maturing in their faith. He concludes that the essence of spirituality is love, which transcends spiritual gifts and is essential for true growth in Christ. The sermon serves as a call for believers to pursue a deeper, Spirit-led life that reflects Christ's love and unity within the Body of Christ.