Few forms of Christianity have offered an ideal of Christian perfection so pure as the Celtic Church of the sixth, seventh, and eighth centuries. Nowhere, perhaps, has God been better worshipped in spirit than in those great monastic communities of Hy, or of Iona, of Bangor, of Clonard, or of Lindisfarne. One of the most distinguished developments of Christianity--doubtless too distinguished for the popular and practical mission which the Church had to undertake--Pelagianism, arose from it. The true and refined morality, the simplicity, and the wealth of invention which give distinction to the legends of the Breton and Irish saints are indeed admirable. No race adopted Christianity with so much originality, or, while subjecting itself to the common faith, kept its national characteristics more persistently. In religion, as in all else, the Bretons sought isolation, and did not willingly fraternise with the rest of the world. Strong in their moral superiority, persuaded that they possessed the veritable canon of faith and religion, having received their Christianity from an apostolic and wholly primitive preaching, they experienced no need of feeling themselves in communion with Christian societies less noble than their own. Thence arose that long struggle of the Breton churches against Roman pretensions, which is so admirably narrated by M. Augustin Thierry, [Footnote: In his History of the Conquest. The objections raised by M. Varin and some other scholars to M. Thierry's narrative only affect some secondary details, which were rectified in the edition published after the illustrious historian's death.] thence those inflexible characters of Columba and the monks of Iona, defending their usages and institutions against the whole Church, thence finally the false position of the Celtic peoples in Catholicism, when that mighty force, grown more and more aggressive, had drawn them together from all quarters, and compelled their absorption in itself. Having no Catholic past, they found themselves unclassed on their entrance into the great family, and were never able to succeed in creating for themselves an Archbishopric. All their efforts and all their innocent deceits to attribute that title to the Churches of Dol and St. Davids were wrecked on the overwhelming divergence of their past; their bishops had to resign themselves to being obscure suffragans of Tours and Canterbury.