This sermon explores the identity of Jesus Christ as revealed in Revelation 1, emphasizing His self-identification as the First and the Last, the Living One who conquered death. The message highlights the theological significance of Jesus holding the keys to death and Hades, demonstrating His sovereign authority over all creation and the church. By connecting this revelation to the believer’s union with Christ, the sermon explains how the resurrection power of Jesus enables the mortification of sin and the assurance of eternal life. The tone is pastoral and instructional, encouraging believers to rest confidently in Christ’s victory and to pass on the truth of the Gospel to future generations. The central intent is to affirm the sufficiency of Christ’s work for salvation and daily sanctification.