§ 2.  Doctrine of the Holy Trinity.  “The doctrinal position of S. Cyril is admirably described, and his orthodoxy vindicated by Cardinal Newman in the following passage of his Preface to the Lectures in the Library of the Fathers.  “There is something very remarkable and even startling to the reader of S. Cyril, to find in a divine of his school such a perfect agreement, for instance as regards the doctrine of the Trinity, with those Fathers who in his age were more famous as champions of it.  Here is a writer, separated by whatsoever cause from what, speaking historically, may be called the Athanasian School, suspicious of its adherents, and suspected by them; yet he, when he comes to explain himself, expresses precisely the same doctrine as that of Athanasius or Gregory, while he merely abstains from the particular theological term in which the latter Fathers agreeably to the Nicene Council conveyed it.  Can we have a clearer proof that the difference of opinion between them was not one of ecclesiastical and traditionary doctrine, but of practical judgment? that the Fathers at Nicæa wisely considered that, under the circumstances, the word in question was the only symbol which would secure the Church against the insidious heresy which was assailing it, while S. Cyril, with Eusebius of Cæsarea, Meletius and others shrank from it, at least for a while, as if an addition to the Creed, or a word already taken into the service of an opposite heresy, and likely to introduce into the Church heretical notions?  Their judgment, which was erroneous, was their own; their faith was not theirs only, but shared with them by the whole Christian world Preface, p. ix..”