important light is shed on the doctrines, held, as well as the practices observed, by the Church of the second century. It may be made matter of regret, that so large a portion of the work of Irenæus is given to an exposition of the manifold Gnostic speculations. Nothing more absurd than these has probably ever been imagined by rational beings. Some ingenious and learned men have in- deed endeavoured to reconcile the wild theories of these heretics with the principles of reason; but, as Bishop Kaye remarks (Eccl. Hist. of the Second and Third Centuries, p. 524), “a more arduous or unpromising undertaking cannot well be conceived.” The fundamental object of the Gnostic speculations was doubtless to solve the two grand problems of all reli- gious philosophy, viz., How to account for the existence of evil; and, How to reconcile the finite with the infinite. But these ancient theorists were not more successful in grappling with such questions than have been their successors in modern times. And by giving loose reins to their imagination, they built up the most incongruous and ridiculous systems; while, by deserting the guidance of Scripture they were betrayed into the most pernicious and ex- travagant errors. Accordingly, the patience of the reader is sorely tried, in following our author through those mazes of absurdity which he treads, in explaining and refuting these Gnostic specula- tions. This is especially felt in the perusal of the first two books, which, as has been said, are principally devoted to an exposition and subversion of the various heretical systems. But the vagaries of the human mind, however melancholy in themselves, are never altogether destitute of instruction. And in dealing with those set before us in this work, we have not only the satisfaction of becoming acquainted with the currents of thought prevalent in these early times, but we obtain much valuable information regarding the primitive Church, which, had it not been for these heretical schemes, might never have reached our day. Not a little of what is contained in the following pages will seem almost unintelligible to the English reader. And it is scarcely more comprehensible to those who have pondered long on the original. We have inserted brief notes of explanation where these seemed specially necessary. But we have not thought it worth while to devote a great deal of space to the elucidation of those obscure Gnostic views which, in so many varying forms, are set forth in this work. For the same reason, we give here no account of the origin, history, and suc- cessive phases of Gnosticism. Those who wish to know the views of the learned on these points, may consult the writings of Neander, Baur, and others, among the Germans, or the lectures of Dr. Burton in English; while a succinct description of the whole matter will be found in the “Preliminary Observations on the Gnostic System,” prefixed to Harvey’s edition of Irenæus. The great work of Irenæus, now for the first time translated into English, is unfortunately no longer extant in the original. It has come down to us only in an ancient Latin version, with the exception of the greater part of the first book, which has been preserved in the 837 Introductory Note to Irenæus Against Heresies