What does it mean that Jesus is the Alpha and Omega?

The titles 'Alpha and Omega,' found in Revelation 1:8, emphasize that Jesus is the complete and eternal sovereign over all creation. He is the source of all life and the ultimate fulfillment of God's redemptive plan. This means He initiated creation and will also bring it to its consummation. For believers, this assures us that our salvation, beginning with Christ's incarnation and culminating in His return, is secure and entirely in His hands. He is the author and finisher of faith (Hebrews 12:2), encapsulating the entirety of the believer’s journey.