And I stood upon the sand of the sea, and saw a beast rise up out of the sea, having seven heads and ten horns, and upon his horns ten crowns, and upon his heads the name of blasphemy
the faithful (to I don't know what) want to be enthralled with this.
Irenaeus had lots of apocalyptic books to chose from when he was compiling the NT canon. He chose this one. In the words of Jay Weidner, "The Book of Revelation had the authority of the Apostle John behind it as well as a distinctive Gnostic flavor." The bishop's selection of this text as the dramatic conclusion of the Christian testament welded two important strains of the faith together: the apostolic faith represented by the Roman hierarchy on the one hand and the far-flung congregations inspired by a more ecstatic gnostic form of Christianity on the other.
This book spoke to and continues to speak to an overwhelming sense of world- weariness and a desire for the complete transfiguration of what is seen as an imperfect and sinful world.