Revelation 22:20

He which testifieth these things,.... Not the angel, Re 22:16 nor John, who sometimes used this way of speaking, Joh 21:24 but Christ, as appears from what follows; for hesaith, surely I come quickly; who not only asserts the speediness of his coming, as in Re 22:7 but expresses the certainty of it, so that it ought not to be doubted of by any, especially by his own people; though it may seem to be deferred, and, upon that account, be derided by ungodly men; and Christ may have some respect, in this strong repetition of it, to the certainty of the punishment that will then be inflicted upon such who add to, or diminish from this book; for he himself will certainly come in person, and execute the vengeance threatened.