T. Austin-Sparks emphasizes the supreme importance of the incorruptible life embodied in Jesus Christ, who represents the true purpose of humanity as intended by God. He explains that through Christ's union with the Father, established by the Holy Spirit, we see the essence of incorruptibility and the restoration of man's purpose, which was lost due to sin. The sermon highlights that Christ's life and death exemplified incorruption, providing a model for believers to seek a relationship with God that transcends mere sovereignty to one of fellowship. Sparks challenges listeners to evaluate how much of God is reflected in their lives and interactions, urging them to ensure that their existence leads others to a deeper knowledge of God. Ultimately, the message calls for a life that embodies the incorruptible characteristics of Christ, fostering a genuine connection with God.