T. Austin-Sparks emphasizes the significance of the Jordan crossing as a pivotal moment for the Israelites, symbolizing a transition from the wilderness to a new life in Christ. He explains that this passage represents a spiritual journey from the authority of darkness to the authority of Christ, and from a barren existence to a fruitful life in the Spirit. The sermon highlights the importance of recognizing Jesus as both Savior and Lord, and the necessity of personal identification with Him through faith and testimony. Sparks encourages believers to take ownership of their faith, symbolized by the stones taken from the Jordan, as a commitment to their union with Christ in His death and resurrection. Ultimately, he calls for a shift from self-centeredness to a life fully devoted to God's purpose.