I am Alpha and Omega - See the notes on Revelation 1:8, Revelation 1:11. The idea here is, that he will thus show that he is the first and the last - the beginning and the end. He originated the whole plan of salvation, and he will determine its close; he formed the world, and he will wind up its affairs. In the beginning, the continuance, and the end, he will be recognized as the same being presiding over and controlling all.

I am Alpha and Omega - See on Revelation 1:8 (note), Revelation 1:18 (note).

I am Alpha and Omega,.... See Gill on Revelation 1:8. These characters are all put together here, which are before used in Revelation 1:8 and are very pertinently mentioned in this place, when all promises and prophecies, relating to the glorious kingdom of Christ, were just finishing, and that itself was ready to appear, in which Christ alone should be exalted, the mystery of God would be completed, and time itself be no more. The Ethiopic version adds, "the beginning and end of days", or time. A testimony this, of the deity, eternity, infinity, and perfection of Christ.

I am Alpha--Greek, ". . . the Alpha and the Omega." A, B, Vulgate, Syriac, ORIGEN, and CYPRIAN transpose thus, "the First and the Last, the Beginning and the End." ANDREAS supports English Version. Compare with these divine titles assumed here by the Lord Jesus, Revelation 1:8, Revelation 1:17; Revelation 21:6. At the winding up of the whole scheme of revelation He announces Himself as the One before whom and after whom there is no God.

I am Alpha and Omega. See notes on Revelation 1:8. The three titles given here have a similar signification.
Blessed are they that wash their robes. See the Revision. Those who have their robes washed are those whose sins are forgiven, and who obey Christ. These have the right to enter the city, for no sinner can enter there.
Without are dogs. In an oriental city the dogs, an unclean animal, are seen in great numbers in the streets, and are a disagreeable feature. These are taken to represent one type of sinners. Others with different characteristics are also given. All are without. None of them ever pass through the portals of the New Jerusalem.
I Jesus. The Lord is still Jesus, that is the Savior.
Have sent mine angel to testify. See Revelation 1:1. Here at the close where the Lord speaks in personal communication to John, he speaks of himself by the name Jesus.
I am the root and the offspring of David. See Revelation 5:5.

I am the Alpha and the Omega, the first and the last - Who exist from everlasting to everlasting. How clear, incontestable a proof, does our Lord here give of his divine glory!