Behold, I come quickly (cf. Revelation 22:12, Revelation 22:20; Revelation 3:11). The narration passes into the words of Christ himself, just as in Revelation 22:12 and Revelation 11:3. Blessed is he that keepeth the sayings of the prophecy of this book.
Because they are "faithful and true" (Revelation 11:6). The command given in Revelation 1:11, Revelation 1:19 is now supposed to have been carried out (cf. the same words in Revelation 1:3).