Now, then, let us consider the mutual relation of Christianity and heresy under these circumstances. § 1. _The Arians of the Gothic Race._ No heresy has started with greater violence or more sudden success than the Arian; and it presents a still more remarkable exhibition of these characteristics among the barbarians than in the civilized world. Even among the Greeks it had shown a missionary spirit. Theophilus in the reign of Constantius had introduced the dominant heresy, not without some promising results, to the Sabeans of the Arabian peninsula; but under Valens, Ulphilas became the apostle of a whole race. He taught the Arian doctrine, which he had unhappily learned in the Imperial Court, first to the pastoral Mœsogoths; who, unlike the other branches of their family, had multiplied under the Mœsian mountains with neither military nor religious triumphs. The Visigoths were next corrupted; by whom does not appear. It is one of the singular traits in the history of this vast family of heathens that they so instinctively caught, and so impetuously communicated, and so fiercely maintained, a heresy, which had excited in the Empire, except at Constantinople, little interest in the body of the people. The Visigoths are said to have been converted by the influence of Valens; but Valens reigned for only fourteen years, and the barbarian population which had been admitted to the Empire amounted to nearly a million of persons. It is as difficult to trace how the heresy was conveyed from them to the other barbarian tribes. Gibbon seems to suppose that the Visigoths acted the part of missionaries in their career of predatory warfare from Thrace to the Pyrenees. But such is the fact, however it was brought about, that the success in arms and the conversion to Arianism, of Ostrogoths, Alani, Suevi, Vandals, and Burgundians stand as concurrent events in the history of the times; and by the end of the fifth century the heresy had been established by the Visigoths in France and Spain, in Portugal by the Suevi, in Africa by the Vandals, and by the Ostrogoths in Italy. For a while the title of Catholic as applied to the Church seemed a misnomer; for not only was she buried beneath these populations of heresy, but that heresy was one, and maintained the same distinctive tenet, whether at Carthage, Seville, Toulouse, or Ravenna. 2.