Revelation 1:8 (BSB)

“I am the Alpha and the Omega,” says the Lord God, who is and was and is to come—the Almighty.

From Revelation 1. Also in the ESV.

Commentary on Revelation 1:8

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Revelation 1:3-8: We have here an apostolic benediction on those who should give a due regard to this divine revelation; and this benediction is given more generally and more especially. I. More generally, to all who either read or hear the words of the prophecy.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Revelation 1:8: I am Alpha and Omega,.... These are the words of Christ himself, appearing at once, and confirming what John had said of him, concerning his person, offices, and future coming: Alpha is the first letter, and Omega the last in the Greek alphabet, and signifies that Christ is the first and the last, as it is interpreted in Rev 1:11, and is a character often...
• Albert Barnes (Presbyterian), Barnes' New Testament Notes on Revelation 1:8: Verse 8. I am Alpha and Omega. These are the first and the last letters of the Greek alphabet, and denote properly the first and the last. So in , when the two expressions are united, "I am Alpha and Omega, the beginning and the end, the first and the last." So in , the speaker says of himself, "I am the first and the...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Revelation 1:8: Greek, "I am the Alpha and the Omega." The first and last letters of the alphabet. God in Christ comprises all that goes between, as well as the first and last. the beginning and the ending--omitted in the oldest manuscripts, though found in Vulgate and Coptic. Transcribers probably inserted the clause from Rev 21:6.