T. Austin-Sparks emphasizes the dual aspects of Christ's death: the substitutionary aspect, which provides vicarious redemption, and the representative aspect, which calls believers to identify with Christ's death in their own lives. He illustrates this through the lives of Abraham and Moses, highlighting the necessity of separating from the old nature to embrace the new life in Christ. Sparks points out that true spiritual service requires the crucifixion of the natural man, as the old self cannot inherit the spiritual promises. He stresses that understanding our identification with Christ's death is crucial for living a fruitful Christian life. Ultimately, the sermon calls for a deep recognition of the need for the old man to be put to death to fully experience the new life in the Spirit.