The difficulty was to find a formula. The test of Nicæa could not be superseded without putting something in its place, which should include Arianism as effectually as the other had excluded it. Such a test was eventually (after 357) found in the word homoios [76] . It was a word with a good Catholic history. We find it used freely by Athanasius in his earlier anti-Arian writings, and it was thoroughly current in conservative theology, as for example in Cyril's Catecheses (he has homoion kata tas graphas and homoion kata panta). It would therefore permit even the full Nicene belief. On the other hand many of the more earnest conservative theologians had begun to reflect on what was involved in the likeness' of the Son to the Father, and had formulated the conviction that this likeness was essential, not, as the Arians held, acquired. This was in fact a fair inference from the ousias aparallakton eikona of the Dedication Creed. This question made an agreement between men like Valens and Basil difficult, but it could be evaded by keeping to the simple homoion, and deprecating non-scriptural precision. Lastly, there were the Anomoeans to be considered. Now the homoion had the specious appearance of flatly contradicting this repellent avowal of the extremists; but to Valens and his friends it had the substantial recommendation of admitting it in reality. Likeness' is a relative term. If two things are only like' they are ipso facto to some extent unlike; the two words are not contradictories but correlatives, and if the likeness is not essential, the unlikeness is. So far then as the Homoean' party rested on any doctrinal principle at all, that principle was the principle of Arius; and that is how Valens forwarded the Anomoean cause by putting himself at the head of the Homoeans. His plan of campaign had steadily matured. The deposition of Photinus in 351 had sounded the note of war, Arles and Milan (353-5) and the expulsion of Athanasius (356) had cleared the field of opponents, George was now in possession at Alexandria, and in the summer of 357 the triumph of Arianism was proclaimed. A small council of bishops met at Sirmium and published a Latin Creed, insisting strongly (1) on the unique Godhead of the Father, (2) on the subjection of the Son along with all things subjected to Him by the Father,' and (3) strictly proscribing the terms homoousion, homoiousion, and all discussion of ousia, as unscriptural and inscrutable.
This manifesto was none the less Anomoean for not explicitly avowing the obnoxious phrase. It forbids the definition of the likeness' as essential, and does not even condescend to use the homoion at all. The Nicene definition is for the first time overtly and bluntly denounced, and the conservatives' are commanded to hold their peace. The Sirmium blasphemy' was indeed a trumpet-blast of defiance. The echo came back from the Homoeans assembled at Antioch, whence Eudoxius the new bishop, Acacius, and their friends addressed the Pannonians with a letter of thanks. But the blast heralded the collapse of the Arian cause; the Reaction fell to pieces the moment Arianism ventured to have a policy of its own' (Gwatkin, p. 158, the whole account should be consulted). Not only did orthodox Gaul, under Phoebadius of Agen, the most stalwart of the lesser men whom Milan had spared, meet in synod and condemn the blasphemy, but the conservative East was up in arms against Arianism, for the first time with thorough spontaneity. Times were changed indeed; the East was at war with the West, but on the side of orthodoxy against Arianism.
(c) We must now take account of the party headed by Basil of Ancyra and usually (since Epiphanius), but with some injustice, designated as Semi-Arians. Their theological ancestry and antecedents have been already sketched (pp. xxvii., xxxv.); they are the representatives of that conservatism, moulded by the neo-Asiatic, or modified Origenist tradition, which warmly condemned Arianism at Nicæa, but acquiesced with only half a heart in the test by which the Council resolved to exclude it. They furnished the numerical strength, the material basis so to call it, of the anti-Nicene reaction; but the reaction on their part had not been Arian in principle, but in part anti-Sabellian, in part the empirical conservatism of men whose own principles are vague and ill-assorted, and who fail to follow the keener sight which distinguishes the higher conservatism from the lower. They lent themselves to the purposes of the Eusebians (a name which ought to be dropped after 342) on purely negative grounds and in view of questions of personal rights and accusations. A positive doctrinal formula they did not possess. But in the course of years reflexion did its work. A younger generation grew up who had not been taught to respect Nicæa, nor yet had imbibed Arian principles. Cyril at Jerusalem, Meletius at Antioch, are specimens of a large class. The Dedication Creed at Antioch represents an early stage in the growth of this body of conviction, conviction not absolutely uniform everywhere, as the result shews, but still with a distinct tendency to settle down to a formal position with regard to the great question of the age. There was nothing in the Nicene doctrine that men like this did not hold: but the word homoousion opened the door to the dreaded Sabellian error: was not the history of Marcellus and Photinus a significant comment upon it? But if ousia meant not individuality, but specific identity (supr., p. xxxi. sq.) even this term might be innocently admitted. But to make that meaning plain, what was more effective than the insertion of an iota? Omoiousios, then, was the satisfactory test which would banish Arius and Marcellus alike. Who first used the word for the purpose, we do not know, but its first occurrence is its prohibition in the blasphemy' of Valens in 357. The leader of the semi-Arians' in 357 was Basil of Ancyra, a man of deep learning and high character. George of Laodicea, an original Arian, was in active but short-lived [77] alliance with the party, other prominent members of it were Eustathius, Bishop of Sebaste (Sivas), Eleusius of Cyzicus, Macedonius of Constantinople, Eusebius of Emesa, Cyril of Jerusalem, and Mark of Arethusa, a high-minded but violent man, who represents the left' wing of the party as Cyril and Basil represent the right.'
Now the trumpet-blast' of Valens gave birth to the Semi-Arians' as a formal party. An attempt was made to reunite the reaction on a Homoean basis in 359, but the events of that year made the breach more open than ever. The tendency towards the Nicene position which received its impulse in 357 continued unchecked until the Nicene cause triumphed in Asia in the hands of the conservatives' of the next generation.
Immediately after the Acacian Synod at Antioch early in 358, George of Laodicea, who had reasons of his own for indignation against Eudoxius, wrote off in hot haste to warn Basil of the fearful encouragement that was being given to the doctrines of Aetius in that city. Basil, who was in communication (through Hilary) with Phoebadius and his colleagues, had invited twelve neighbouring bishops to the dedication of a church in Ancyra at this time, and took the opportunity of drawing up a synodical letter insisting on the Essential Likeness of the Son to the Father (homoion kat' ousian), and eighteen anathemas directed against Marcellus and the Anomoeans. (The censure of homoousion e tautoousion is against the Marcellian sense of the homoousion). Basil, Eustathius, and Eleusius then proceeded to the Court at Sirmium and were successful in gaining the ear of the Emperor, who at this time had a high regard for Basil, and apparently obtained the ratification by a council, at which Valens, &c., were present, of a composite formula of their own (Newman's semi-Arian digest of three Confessions') which was also signed by Liberius, who was thereupon sent back to Rome. (Soz. iv. 15 is our only authority here, and his account of the formula is not very clear: he seems to mean that two, not three, confessions were combined. (Cf. p. 449, note 4.) On the whole, it is most probable that the fourth' Antiochene formula in its Sirmian recension of 351 is intended, perhaps with the addition of twelve of the Ancyrene anathemas. (The question of the signatures of Liberius need not detain us.) The party of Valens were involved in sudden and unlooked-for discomfiture. Basil even succeeded in obtaining a decree of banishment against Eudoxius, Aetius, and seventy' others (Philost. iv. 8). But an Arian deputation from Syria procured their recall, and all parties stood at bay in mutual bitterness.
Now was the opportunity of Valens. He saw the capabilities of the Homoean compromise, as yet embodied in no creed, and resolved to try it: and his experiment was not unsuccessful. All parties alike seem to have agreed upon the necessity for a council of the whole Church (on the origin of the proposal, and for other details, see p. 448). But Valens was determined what the result of the council must be. Accordingly he prevailed on the Emperor to divide it, the Western Synod to meet at Ariminum, the Eastern at Rocky Seleucia,' a mountain fortress in Cilicia where there happened to be plenty of troops. The management of the latter was entrusted to Acacius; at Rimini Valens would be present in person. In event of the two synods differing, a delegation of ten bishops from each was to meet at Court and settle the matter. The Creed to be adopted had also to be arranged beforehand, and for this purpose, to his great discredit, Basil of Ancyra entered into a conference (along with Mark of Arethusa and certain colleagues) with Valens, George of Alexandria, and others of like mind. The result was the Dated Creed' (May 22, 359) drawn by Mark, prohibiting the word ousia (in a gentler tone than that of the creed of Valens in 357), but containing the definition homoion kata panta (as also the Scriptures teach,' see above, on Cyril, p. xlix.), words which Valens and Ursacius sought to suppress. But Constantius insisted on their retention, and Basil emphasised his subscription by a strongly-worded addition. Moreover in conjunction with George of Laodicea he drew up a memorandum (Epiph. 72, 12-22) vindicating the term ousia as implied in Scripture, insisting on the absolute essential likeness of the Son to the Father, except in respect of the Incarnation, and repudiating the idea that agennesia is the essential notion of Godhead. Such a protest was highly significant as an approach to the Nicene position, but Basil must have felt its inefficiency for the purpose in hand. Had the creed been anything but a surrender of principle on his part, no explanatory memoranda would have been needed.
After the fiasco of the Dated Creed, the issue of the Councils was not doubtful. The details may be reserved for another place (pp. 448, 453 sqq.), but the general result is noteworthy. At both Councils the court party were in a minority, and in both alike they eventually had their way. (See Bright, Hist. Tr. lxxxiv.-xc., and Gwatkin, 170-180.) On the whole the Seleucian synod came out of the affair more honourably than the other, as their eventual surrender was confined to their delegates. Both Councils began bravely. The majorities deposed their opponents and affirmed their own faith, the Westerns that of Nicæa, the Easterns that of the Dedication. From both Councils deputations from each rival section went to the Emperor, who was now at Constantinople. The deputies from the majority at Ariminum, where the meeting had begun fully two months before the other, were not received, but detained first at Hadrianople, then at Niké in Thrace (chosen, says Socr. ii. 37, to impose on the world by the name), where they were induced to sign a recension of the Dated Creed (the Creed itself had been revoked and recast without the date and perhaps without the kata panta before the preliminary meeting at Sirmium broke up, p. 466) of a more distinctly Homoean character. Armed with this document Valens brought them back to the Council, and by threats and cajolery' obtained the signatures of nearly all the bishops. Yet the stalwart Phoebadius, Claudius of Picenum, the venerable African Muzonius, father of the Council, and a few others, were undaunted. But Valens, by adroit dissimulation and by guiding into a manageable shape the successive anathematisms by which his orthodoxy was tested, managed to deceive these simple-minded Westerns, and with applause and exultation, plausu quodam et tripudio' (Jer.), amidst which Valens was lauded to the skies' (!), the bishops were released from their wearisome detention and suspense. But Valens cum recessisset tunc gloriabatur' (Prov. xx. 14). The Western bishops realised too late what they had done, Ingemuit totus orbis, et se Arianum esse miratus est.' Valens hurried with the creed and the anathemas of Phoebadius to Constantinople, where he found the Seleucian deputies in hot discussion at court. The Eastern bishops at Seleucia had held to the Lucianic' creed, and contemptuously set aside not only the Acacian alternative (p. 466), but the whole compromise of Basil and Mark at the Sirmian conference of the preceding May. The Conservatives' and Acacians were at open war. But the change of the seat of war to the court gave the latter the advantage, and Valens and Acacius were determined to secure their position at any cost. The first step was to compel the signature of the semi-Arian' deputies to the creed of Ariminum. This was facilitated by the renewal on the part of Acacius and Valens of their repudiation, already announced at Seleucia (p. 466), of the 'Anomoion, (of course with the mental reservation that the repudiation referred only to will). Even so, tedious discussions [78] , and the threats of Constantius, with whom Basil had now lost all his influence (Thdt. ii. 27), were needed to bring about the required compliance late at night on New Year's Eve, 359-360 (Soz. iv. 23). In January, at the dedication of the Great Church of Constantine, the second step was taken. The revised creed of Niké was reissued without the anathemas of Ariminum. Aetius was offered by his friend Eudoxius as a sacrifice to the Emperor's scruples (see the account of the previous debates in Thdt. ubi supra), much as Arius had been sacrificed by his fellow-Lucianists at Nicæa (§2 supra: nine bishops protested, but were allowed six months to reconsider their objection; the six months lasted two years, and then a reconciliation with Aetius took place for a time, Philost. vii. 6). Next a clean sweep was made of the leading semi-Arians on miscellaneous charges (Soz. iv. 24, sq.), and Eudoxius was installed as bishop of the New Rome in the place of Macedonius. The sacrifice of Aetius gave the Homoeans a free hand against their opponents, and was compensated by the appointment of numerous Anomoeans to vacant sees. In particular Eunomius replaced Eleusius at Cyzicus. In the eastern half of the Empire Homoeanism was supreme, and remained so politically for nearly twenty years. But not in the West. Before the Council of Constantinople met, the power of the West had passed away from Constantius. Gaul had acknowledged Julian as Augustus, and from Gaul came the voice of defiance for the Homoean leaders and sympathy for their deposed opponents (Hil. Frag. xi.). And even in the East, throughout their twenty years the Homoeans retained their hold upon the Church by a dead hand. The moral strength of Christendom lay elsewhere;' on the one hand the followers of Eunomius were breaking loose from Eudoxius and forming a definitely Arian sect, those of Macedonius crystallising their cruder conservatism into the illogical creed of the Pneumatomachi;' on the other hand the second generation of the semi-Arians' were, under the influence of Athanasius, working their way to the Greek Catholicism of the future, the Catholicism of the neo-Nicene school, of Basil and the two Gregories.