The Importance of the Book of Apocalypse

Wrote Dr. J. A. Seiss in his famous book "The Apocalypse" (emphasis mine):

THIS book of the Apocalypse is one of the most wonderful in the Sacred Scriptures. As the Bible among literature, so is this part of it among the inspired writings. Though it has had to fight its way in every age, and to struggle to maintain its place in the sacred canon, there is not another book in the volume of inspiration more strongly attested, or more fully authenticated. Its superscription, its historical statements, its catena of testimonies, and the nature of its contents, amply evidence its genuineness, and its divine original. Its imposing scenery, its grand similitudes, its pregnant maxims, its significant dialogues, its stirring exhortations, its glowing prayers, its evangelic songs, and its sublime doxologies, give to it all the majesty of the book of the mighty consummation, not of inspiration only, but of the grandest revealed plans and purposes of God. And if an inspired book at all, there is not another which so solemnly enforces itself upon the attention of the Churches, or that is compassed about with guards and penalties more explicit and severe. We must needs regard its author as an unaccountable boaster, if it is not the highest interest and duty of every earnest Christian to read and try to understand it, so as to take its momentous presentations in among the most settled and potent things by which to direct his way and fashion his expectations. (Comment upon Rev. 12: 1,2)