The occasion of reproducing this little work, the fortunes of which we noticed in the preface of our first book, has furnished us with the opportunity of distinguishing, in our treatment of the subject of two Gods in opposition to Marcion, each of them with a description and section of his own, according to the division of the subject-matter, defining one of the gods to have no existence at all, and maintaining of the Other that He is rightly God; thus far keeping pace with the heretic of Pontus, who has been pleased to admit one unto, and exclude the other. For he could not build up his mendacious scheme without pulling down the system of truth. He found it necessary to demolish some other thing, in order to build up the theory which he wished. This process, however, is like constructing a house without preparing suitable materials. The discussion ought to have been directed to this point alone, that he is no god who supersedes the Creator. Then, when the false god had been excluded by certain rules which prescriptively settle what is the character of the One only perfect Divinity, there could have remained no longer any question as to the true God. The proof of His existence would have been clear, and that, too, amid the failure of all evidence in support of any other god; and still clearer would have seemed the point as to the honour in which He ought without controversy to be held: that He ought to be worshipped rather than judged; served reverentially rather than handled critically, or even dreaded for His severity. For what was more fully needed by man than a careful estimate of the true God, on whom, so to speak, he had alighted, because there was no other god?