The whole great history of the Arian heresy might have been invented to explode this idea. It is a very interesting history often repeated in this connection; and the upshot of it is in that in so far as there ever was a merely official religion, it actually died because it was a merely official religion; and what destroyed it was the real religion. Arius advanced a version of Christianity which moved, more or less vaguely, in the direction of what we should call Unitarianism; though it was not the same, for it gave to Christ a curious intermediary position between the divine and human. The point is that it seemed to many more reasonable and less fanatical; and among these were many of the educated class in a sort of reaction against the first romance of conversion. Arians were a sort of moderates and a sort of modernists. And it was felt that after the first squabbles this was the final form of rationalised religion into which civilisation might well settle down. It was accepted by Divus Caesar himself and became the official orthodoxy; the generals and military princes drawn from the new barbarian powers of the north, full of the future, supported it strongly. But the sequel is still more important. Exactly as a modern man might pass through Unitarianism to complete agnosticism, so the greatest of the Arian emperors ultimately shed the last and thinnest pretence of Christianity; he abandoned even Arius and returned to Apollo. He was a Caesar of the Caesars; a soldier, a scholar, a man of large ambitions and ideals; another of the philosopher kings. It seemed to him as if at his signal the sun rose again. The oracles began to speak like birds beginning to sing at dawn; paganism was itself again; the gods returned. It seemed the end of that strange interlude of an alien superstition. And indeed it was the end of it, so far as there was a mere interlude of mere superstition. It was the end of it, in so far as it was the fad of an emperor or the fashion of a generation. If there really was something that began with Constantine, then it ended with Julian.
But there was something that did not end. There had arisen in that hour of history, defiant above the democratic tumult of the Councils of the Church, Athanasius against the world. We may pause upon the point at issue; because it is relevant to the whole of this religious history, and the modern world seems to miss the whole point of it. We might put it this way. If there is one question which the enlightened and liberal have the habit of deriding and holding up as a dreadful example of barren dogma and senseless sectarian strife, it is this Athanasian question of the Co-Eternity of the Divine Son. On the other hand, if there is one thing that the same liberals always offer us as a piece of pure and simple Christianity, untroubled by doctrinal disputes, it is the single sentence, “God is Love.” Yet the two statements are almost identical; at least one is very nearly nonsense without the other. The barren dogma is only the logical way of stating the beautiful sentiment. For if there be a being without beginning, existing before all things, was He loving when there was nothing to be loved? If through that unthinkable eternity He is lonely, what is the meaning of saying He is love? The only justification of such a mystery is the mystical conception that in His own nature there was something analogous to self-expression; something of what begets and beholds what it has begotten. Without some such idea, it is really illogical to complicate the ultimate essence of deity with an idea like love. If the moderns really want a simple religion of love, they must look for it in the Athanasian Creed. The truth is that the trumpet of true Christianity, the challenge of the charities and simplicities of Bethlehem or Christmas Day, never rang out more arrestingly and unmistakably than in the defiance of Athanasius to the cold compromise of the Arians. It was emphatically he who really was fighting for a God of Love against a God of colourless and remote cosmic control; the God of the stoics and the agnostics. It was emphatically he who was fighting for the Holy Child against the grey deity of the Pharisees and the Sadducees. He was fighting for that very balance of beautiful interdependence and intimacy, in the very Trinity of the Divine Nature, that draws our hearts to the Trinity of the Holy Family. His dogma, if the phrase be not misunderstood, turns even God into a Holy Family.
That this purely Christian dogma actually for a second time rebelled against the Empire, and actually for a second time refounded the Church in spite of the Empire, is itself a proof that there was something positive and personal working in the world, other than whatever official faith the Empire chose to adopt. This power utterly destroyed the official faith that the Empire did adopt. It