When we examine the Cæsarean creed [2] which Eusebius presented to the Council as a fair statement of his belief, we find nothing in it inconsistent with the acceptance of the kind of Arianism which he defends in his epistle to Alexander, and which he evidently supposed to be practically the Arianism of Arius himself. In his epistle to Euphration, however, Eusebius seems at first glance to go further and to give up the real divinity of the Son. His words are, "Since the Son is himself God, but not true God." But we have no right to interpret these words, torn as they are from the context which might make their meaning perfectly plain, without due regard to Eusebius' belief expressed elsewhere in this epistle, and in his epistle to Alexander which was evidently written about the same time. In the epistle to Alexander he clearly reveals a belief in the real divinity of the Son, while in the other fragment of his epistle to Euphration he dwells upon the subordination of the Son and approves the Arian opinion, which he had defended also in the other epistle, that the "Father was before the Son." The expression, "not true God" (a very common Arian expression; see Athan. Orat. c. Arian. I. 6) seems therefore to have been used by Eusebius to express a belief, not that the Son did not possess real divinity (as the genuine Arians used it), but that he was not equal to the Father, who, to Eusebius' thought, was "true God." He indeed expressly calls the Son theos, which shows--when the sense in which he elsewhere uses the word is considered--that he certainly did believe him to partake of Godhood, though, in some mysterious way, in a smaller degree, or in a less complete manner than the Father. That Eusebius misunderstood Arius, and did not perceive that he actually denied all real deity to the Son, was due doubtless in part to his lack of theological insight (Eusebius was never a great theologian), in part to his habitual dread of Sabellianism (of which Arius had accused Alexander, and toward which Eusebius evidently thought that the latter was tending), which led him to look with great favor upon the pronounced subordinationism of Arius, and thus to overlook the dangerous extreme to which Arius carried that subordinationism.
We are now, the writer hopes, prepared to admit that Eusebius, after the breaking out of the Arian controversy, became an Arian, as he understood Arianism, and supported that party with considerable vigor; and that not as a result of mere personal friendship, but of theological conviction. At the same time, he was then, as always, a peace-loving man, and while lending Arius his approval and support, he united with other Palestinian bishops in enjoining upon him submission to his bishop (Sozomen, H. E. I. 15). As an Arian, then, and yet possessed with the desire of securing, if it were possible, peace and harmony between the two factions, Eusebius appeared at the Council of Nicæa, and there signed a creed containing Athanasian doctrine and anathematizing the chief tenets of Arius. How are we to explain his conduct? We shall, perhaps, do best to let him explain his own conduct. In his letter to the church of Cæsarea (preserved by Socrates, H. E. I. 8, as well as by other authors), he writes as follows:--
"What was transacted concerning ecclesiastical faith at the Great Council assembled at Nicæa you have probably learned, Beloved, from other sources, rumour being wont to precede the accurate account of what is doing. But lest in such reports the circumstances of the case have been misrepresented, we have been obliged to transmit to you, first, the formula of faith presented by ourselves; and next, the second, which the Fathers put forth with some additions to our words. Our own paper, then, which was read in the presence of our most pious Emperor, and declared to be good and unexceptionable, ran thus:--
"As we have received from the Bishops who preceded us, and in our first catechisings, and when we received the Holy Laver, and as we have learned from the divine Scriptures, and as we believed and taught in the presbytery, and in the Episcopate itself, so believing also at the time present, we report to you our faith, and it is this:--
"We believe in One God, the Father Almighty, the Maker of all things visible and invisible. And in One Lord Jesus Christ, the Word of God, God from God, Light from Light, Life from Life, Son Only-begotten, first-born of every creature, before all the ages, begotten from the Father, by whom also all things were made; who for our salvation was made flesh, and lived among men, and suffered, and rose again the third day, and ascended to the Father, and will come again in glory to judge quick and dead. And we believe also in One Holy Ghost; believing each of These to be and to exist, the Father truly Father, and the Son truly Son, and the Holy Ghost truly Holy Ghost, as also our Lord, sending forth His disciples for the preaching, said, Go, teach all nations, baptizing them in the Name of the Father, and of the Son, and of the Holy Ghost. Concerning whom we confidently affirm that so we hold, and so we think, and so we have held aforetime, and we maintain this faith unto the death, anathematizing every godless heresy. That this we have ever thought from our heart and soul, from the time we recollect ourselves, and now think and say in truth, before God Almighty and our Lord Jesus Christ do we witness, being able by proofs to show and to convince you, that, even in times past, such has been our belief and preaching.'
"On this faith being publicly put forth by us, no room for contradiction appeared; but our most pious Emperor, before any one else, testified that it comprised most orthodox statements. He confessed, moreover, that such were his own sentiments; and he advised all present to agree to it, and to subscribe its articles and to assent to them, with the insertion of the single word, One in substance' (homoousios), which, moreover, he interpreted as not in the sense of the affections of bodies, nor as if the Son subsisted from the Father, in the way of division, or any severance; for that the immaterial and intellectual and incorporeal nature could not be the subject of any corporeal affection, but that it became us to conceive of such things in a divine and ineffable manner. And such were the theological remarks of our most wise and most religious Emperor; but they, with a view to the addition of One in substance,' drew up the following formula:--
"We believe in One God, the Father Almighty, Maker of all things visible and invisible:-- And in One Lord Jesus Christ, the Son of God, begotten of the Father, Only-begotten, that is, from the Substance of the Father; God from God, Light from Light, very God from very God, begotten, not made, One in substance with the Father, by whom all things were made, both things in heaven and things in earth; who for us men and for our salvation came down and was made flesh, was made man, suffered, and rose again the third day, ascended into heaven, and cometh to judge quick and dead.
"And in the Holy Ghost. But those who say, "Once He was not," and "Before His generation He was not," and "He came to be from nothing," or those who pretend that the Son of God is "Of other subsistence or substance," or "created," or "alterable," or "mutable," the Catholic Church anathematizes.'
"On their dictating this formula, we did not let it pass without inquiry in what sense they introduced of the substance of the Father,' and one in substance with the Father.' Accordingly questions and explanations took place, and the meaning of the words underwent the scrutiny of reason. And they professed that the phrase of the substance' was indicative of the Son's being indeed from the Father, yet without being as if a part of Him. And with this understanding we thought good to assent to the sense of such religious doctrine, teaching, as it did, that the Son was from the Father, not, however, a part of His substance. On this account we assented to the sense ourselves, without declining even the term One in substance,' peace being the object which we set before us, and steadfastness in the orthodox view. In the same way we also admitted begotten, not made'; since the Council alleged that made' was an appellative common to the other creatures which came to be through the Son, to whom the Son had no likeness. Wherefore, said they, He was not a work resembling the things which through Him came to be, but was of a substance which is too high for the level of any work, and which the Divine oracles teach to have been generated from the Father, the mode of generation being inscrutable and incalculable to every generated nature. And so, too, on examination there are grounds for saying that the Son is one in substance' with the Father; not in the way of bodies, nor like mortal beings, for He is not such by division of substance, or by severance; no, nor by any affection, or alteration, or changing of the Father's substance and power (since from all such the ingenerate nature of the Father is alien), but because one in substance with the Father' suggests that the Son of God bears no resemblance to the generated creatures, but that to His Father alone who begat Him is He in every way assimilated, and that He is not of any other subsistence and substance, but from the Father.
"To which term also, thus interpreted, it appeared well to assent; since we were aware that, even among the ancients, some learned and illustrious Bishops and writers have used the term one in substance' in their theological teaching concerning the Father and Son. So much, then, be said concerning the faith which was published; to which all of us assented, not without inquiry, but according to the specified senses, mentioned before the most religious Emperor himself, and justified by the fore-mentioned considerations. And as to the anathematism published by them at the end of the Faith, it did not pain us, because it forbade to use words not in Scripture, from which almost all the confusion and disorder of the Church have come. Since, then, no divinely inspired Scripture has used the phrases, out of nothing' and once He was not,' and the rest which follow, there appeared no ground for using or teaching them; to which also we assented as a good decision, since it had not been our custom hitherto to use these terms. Moreover, to anathematize Before His generation He was not' did not seem preposterous, in that it is confessed by all that the Son of God was before the generation according to the flesh. Nay, our most religious Emperor did at the time prove, in a speech, that He was in being even according to His divine generation which is before all ages, since even before he was generated in energy, He was in virtue with the Father ingenerately, the Father being always Father, as King always and Saviour always, having all things in virtue, and being always in the same respects and in the same way. This we have been forced to transmit to you, Beloved, as making clear to you the deliberation of our inquiry and assent, and how reasonably we resisted even to the last minute, as long as we were offended at statements which differed from our own, but received without contention what no longer pained us, as soon as, on a candid examination of the sense of the words, they appeared to us to coincide with what we ourselves have professed in the faith which we have already published." [3]
It will be seen that while the expressions "of the substance of the Father," "begotten not made," and "One in substance," or "consubstantial with the Father," are all explicitly anti-Arianistic, yet none of them contradicts the doctrines held by Eusebius before the Council, so far as we can learn them from his epistles to Alexander and Euphration and from the Cæsarean creed. His own explanation of those expressions, which it is to be observed was the explanation given by the Council itself, and which therefore he was fully warranted in accepting,--even though it may not have been so rigid as to satisfy an Athanasius,--shows us how this is. He had believed before that the Son partook of the Godhood in very truth, that He was "begotten," and therefore "not made," if "made" implied something different from "begotten," as the Nicene Fathers held that it did; and he had believed before that the "Son of God has no resemblance to created' things, but is in every respect like the Father only who begat him, and that He is of no other substance or essence than the Father," and therefore if that was what the word "Consubstantial" (homoousios) meant he could not do otherwise than accept that too.