Salvation encompasses more than just the forgiveness of sins through Christ's blood—it includes the transformative power of Christ living within the believer. While the blood of Jesus deals with our individual sins (plural), the indwelling Christ provides victory over the power of sin (singular) in our daily lives. Just as Peter could only walk on water by keeping his eyes on Jesus, believers can only overcome sin's power by completely surrendering to and relying on Christ's life within them, rather than attempting to live the Christian life through their own strength.