In the book of Revelation, the profound declaration of Jesus Christ as the First and the Last resonates with immense power and authority. In Revelation 1:8, He proclaims, "I am the Alpha and the Omega, the Beginning and the End," says the Lord, who is and who was and who is to come, the Almighty. This statement, a crescendo of divine assurance, emphasizes that He encompasses all things—first, last, and everything in between—offering complete security and trust to His followers during tumultuous times ahead. It serves as a reminder that He is everything to His people, the eternal source of strength and salvation. Further, in Revelation 1:11, a loud voice like a trumpet reiterates, "I am the Alpha and the Omega, the First and the Last," commanding John to write what he sees and send it to the seven churches. This reinforces His supreme authority over the messages to be delivered, grounding the instruction in His eternal nature. Then, in Revelation 1:17-18, as John falls at His feet overwhelmed by His glory, He comforts with the words, "Do not be afraid. I am the First and the Last. I am He who lives, and was dead, and behold, I am alive forevermore. Amen. And I have the keys of Hades and of Death." Here, His identity as the First and the Last underscores His victory over death and His enduring presence, assuring His church of His power to guide and protect through all challenges.

Yahweh of the Old Testament and Christ of the New refer to themselves as the First and the Last, signifying that both are the same self-existent, eternal Being. This identity reveals that Jesus Christ, as the God of both Testaments, embodies an unchanging nature, consistent in essence and purpose across all time.

In the context of the Eighth Day and the overarching theme of Jesus Christ as our all in all, the phrases "First and the Last," "Alpha and the Omega," and "Beginning and the End" are profound merisms that encapsulate His complete sovereignty and presence. In Revelation 1:4-11, Jesus declares Himself as the Alpha and the Omega, the Beginning and the End, signifying that He encompasses everything from start to finish. He reiterates this in Revelation 1:17-18, stating, "Do not be afraid; I am the First and the Last. I am He who lives and was dead, and behold, I am alive forevermore," affirming His eternal existence and victory over death. These statements assure us that He is with us through every moment, from our calling to our glorification and beyond into eternal life. Further, in Revelation 22:12-14, Jesus proclaims, "I am coming quickly, and My reward is with Me, to give to everyone according to his work. I am the Alpha and the Omega, the Beginning and the End, the First and the Last," reinforcing His comprehensive authority and the promise of reward for those who endure. These merisms emphasize that He is everything we need, the source of all strength and hope, ensuring that we lack nothing in Him. His presence spans the entirety of time and experience, urging us to stay faithful and endure, knowing that He has conquered all and holds ultimate control.

God explicitly declares Himself the First and the Last, emphasizing His encompassing presence over all time. This declaration implies that He begins and completes His work, remaining with it throughout. As a merism, the phrase suggests that He brackets time, always present for His people, whether viewed from an individual or historical perspective. A subtler expression of this first and last concept appears in the use of the Hebrew verb yacad, meaning to found or begin, which aligns with the idea of first. This verb, seen in various scriptures, conveys the act of initiating or establishing, as in the founding of a nation or laying a foundation. Through yacad, the sense of beginning is clear, underscoring God's role in setting the initial creation.