Verse 13: I am Alpha and Omega, the beginning and the end, the first and the last.
The title of this verse, Alpha and Omega, belonged to Christ alone in this connection, and represented the finality of the sayings of the vision--the first and the last, the beginning and the end, were the words of his authority--the yea and the amen from which there could be no appeal and for which there could be no repeal.
The vision, as previous shown, had closed and these words of Christ were being quoted by John to corroborate and verify his post-vision sayings of this last chapter, and to vindicate all of the claims of credibility. The words of verse thirteen meant--so be it, all in all as here recorded, for it came from Christ the All In All of divine jurisprudence and justice.