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Page 28
Chapter IV.--His Teaching on the Holy Trinity.
To estimate the exact value of the work done by S. Gregory in the establishment of the doctrine of the Trinity and in the determination, so far as Eastern Christendom is concerned, of the terminology employed for the expression of that doctrine, is a task which can hardly be satisfactorily carried out. His teaching on the subject is so closely bound up with that of his brother, S. Basil of Caesarea,--his "master," to use his own phrase,--that the two can hardly be separated with any certainty. Where a disciple, carrying on the teaching he has himself received from another, with perhaps almost imperceptible variations of expression, has extended the influence of that teaching and strengthened its hold on the minds of men, it must always be a matter of some difficulty to discriminate accurately between the services which the two have rendered to their common cause, and to say how far the result attained is due to the earlier, how far to the later presentment of the doctrine. But the task of so discriminating between the work of S. Basil and that of S. Gregory is rendered yet more complicated by the uncertainty attaching to the authorship of particular treatises which have been claimed for both. If, for instance, we could with certainty assign to S. Gregory that treatise on the terms ousia and hupostasis, which Dorner treats as one of the works by which he "contributed materially to fix the uncertain usage of the Church [39] ," but which is found also among the works of S. Basil in the form of a letter addressed to S. Gregory himself, we should be able to estimate the nature and the extent of the influence of the Bishop of Nyssa much more definitely than we can possibly do while the authorship of this treatise remains uncertain. Nor does this document stand alone in this respect, although it is perhaps of more importance for the determination of such a question than any other of the disputed treatises. Thus in the absence of certainty as to the precise extent to which S. Gregory's teaching was directly indebted to that of his brother, it seems impossible to say how far the "fixing of the uncertain usage of the Church" was due to either of them singly. That together they did contribute very largely to that result is beyond question: and it is perhaps superfluous to endeavour to separate their contributions, especially as there can be little doubt that S. Gregory at least conceived himself to be in agreement with S. Basil upon all important points, if not to be acting simply as the mouth-piece of his "master's" teaching, and as the defender of the statements which his "master" had set forth against possible misconceptions of their meaning. Some points, indeed, there clearly were, in which S. Gregory's presentment of the doctrine differs from that of S. Basil; but to these it may be better to revert at a later stage, after considering the more striking variation which their teaching displays from the language of the earlier Nicene school as represented by S. Athanasius.
[39] See Dorner, Doctrine of the Person of Christ, Div. I. vol. ii. p. 314 (English Trans.).
Reference address : https://www.elpenor.org/nyssa/life-works.asp?pg=28