Note (return) — Chapter V

In the "Testimonia" the doctrine of the two Testaments, as developed by Irenæus, forms the framework in which the individual dogmas are set. The doctrine of God, which should have been placed at the beginning, has been left out in this little book probably because the person addressed required no instruction on the point. Some of the dogmas already belong to philosophical theology in the strict sense of the word; in others we have merely a precise assertion of the truth of certain facts. All propositions are, however, supported by passages from the two Testaments and thereby proved.651 The theological counterpart to this is Novatian's work "De Trinitate". This first great Latin work that appeared in Rome is highly important. In regard to completeness, extent of Biblical proofs, and perhaps also its influence on succeeding times, it may in many respects be compared with Origen's work περι αρχων. Otherwise indeed it differs as much from that work, as the sober, meagre theology of the West, devoid of philosophy and speculation, differs in general from that of the East. But it sums up in classic fashion the doctrines of Western orthodoxy, the main features of which were sketched by Tertullian in his antignostic writings and the work against Praxeas. The old Roman symbol forms the basis of the work. In accordance with this the author gives a comprehensive exposition of his doctrine of God in the first eight chapters. Chapters 9-28 form the main portion; they establish the correct Christology in opposition to the heretics who look on Christ as a mere man or as the Father himself; the Holy Scriptures furnish the material for the proofs. Chapter 29 treats of the Holy Spirit. Chapters 30 and 31 contain the recapitulation and conclusion. The whole is based on Tertullian's treatise against Praxeas. No important argument in that work has escaped Novatian; but everything is extended, and made more systematic and polished. No trace of Platonism is to be found in this dogmatic; on the contrary he employs the Stoic and Aristotelian syllogistic and dialectic method used also by his Monarchian opponents. This plan together with its Biblical attitude gives the work great outward completeness and certainty. We cannot help concluding that this work must have made a deep impression wherever it was read, although the real difficulties of the matter are not at all touched upon, but veiled by distinctions and formulæ. It probably contributed not least to make Tertullian's type of Christology the universal Western one. This type, however, as will be set forth in greater detail hereafter, already approximates closely to the resolutions of Nicæa and Chalcedon.652 Novatian adopted Tertullian's formulæ "one substance, three persons" ("una substantia, tres personæ"), "from the substance of God" ("ex substantia dei"), "always with the Father" ("semper apud patrem"), "God and man" ("deus et homo"), "two substances" ("duæ substantiæ"), "one person" ("una persona"), as well as his expressions for the union and separation of the two natures adding to them similar ones and giving them a wider extension.653 Taking his book in all we may see that he thereby created for the West a dogmatic vademecum, which, from its copious and well-selected quotations from Scripture, must have been of extraordinary service.