it may be returned for answer to it, that the Apostle Peter expresses himself much in the same manner, 2Pe 3:2, where some copies, instead of "us the apostles", read "your apostles", See Gill on "2Pe 3:2"; moreover, Jude seems to cite a passage out of Peter, as Peter in the same chapter cites the Apostle Paul, which only shows agreement in their doctrine and writing; and at most it only follows from hence, that Jude wrote after some of the apostles, as Paul and Peter, who had foretold there would be mockers in the last time; and that Jude had lived to be a witness of the truth of what they had said; nor does he exclude himself from their number.
And that this epistle is a genuine one appears from the majesty of its style, the truth of doctrine contained in it, and its agreement with the second epistle of Peter, and from the early reception of it in the churches.
Eusebius says, it was reckoned among the seven catholic epistles, and was published in most churches; though he observes, that many of the ancients make no mention of it: but certain it is, that several of the ancient writers before him do make mention of it, and cite it as genuine, as Clemens Alexandrinus , Tertullian , and Origen : and as for the prophecy of Enoch, cited in this epistle, it is not taken out of an apocryphal book, that bears that name, for the apostle makes no mention of any writing of his, but of a prophecy; and had he cited it out of that book, as it was truth, it can no more prejudice the authority of this epistle, than the citations made by the Apostle Paul out of the Heathen poets can affect his epistles: and whereas there is an account also given in this epistle of a dispute about the body of Moses, nowhere else to be met with, supposing it to be understood of his real body, of whichSee Gill on "Jude 1:9"; this can be no more an objection to the genuineness of this epistle, than the mention of Jannes and Jambres, who withstood Moses, by the Apostle Paul, 2Ti 3:8, is an objection to an epistle of his, whose names are not to be met with in other parts of Scripture; but were what were known by tradition, as might be the case here.