The superscription, if original, compels us to treat the whole writing as not only late but pseudonymous.
These liturgical notes make extremely probable the supposition that the poem has been taken from some collection like that of our present book of Psalms, probably on the ground of the authorship asserted by the superscription there attached to it.
The superscription shows points of connexion with the Rest of the Words of Baruch, but little weight can be attached to the fact, since titles and superscriptions were so frequently transformed and expanded in ancient times.
If the superscription be not from the hand of the actual brother of Jesus, the question may well be asked why some apostolic name was not chosen which might convey greater authority?
The superscription in the case of Jude, unlike that of James, takes hold of the substance of the book.