What does the Bible say about the Alpha and Omega?

In Revelation 1:8, God identifies Himself as the Alpha and Omega, which are the first and last letters of the Greek alphabet. This signifies His absolute sovereignty over all things pertaining to time and eternity, life and death. He is the beginning of creation, as stated in Genesis, and He is the end as He will bring all things to completion. Furthermore, in the context of salvation, He is both the initiator and the finisher, illustrating that salvation is entirely His work and not dependent on human effort or decision. As the Alpha and Omega, He establishes, sustains, and fulfills His divine purposes, revealing Himself as the ultimate authority in all existence.