From the previous reflections we may learn how difficult it was to establish, in pagan Europe, a thoroughly Christian life and doctrine; and that, after society had come to be apparently imbued with the new spirit, it was still too easy to disturb the flowing stream of the heavenly graces of the Gospel. This resulted, we repeat, from causes anterior to Christianity, from sources of evil which the divine religion had to overcome, and which too often impeded its supernatural action. In fact, the ecclesiastical history of those ages is comprised mainly in depicting the almost continual deviations from the straight line of pure doctrine and morality, and the strenuous efforts assiduously made by the rulers of the Church against a never- ceasing falling away. Having taken this glance at the early workings of Christianity through the rest of the world, we may now turn fairly to the immediate subject we have in hand, and trace its course in Ireland. From the very beginning we are struck by the peculiarities--blessed, indeed--which show themselves, as in all other matters, in its reception of the truth. The island, compared with Europe, is small, it is true; but the heroism displayed by its inhabitants during so many ages, in support of the religion which they received so freely, so generously, and at once, in mind as well as heart, marks it out as worthy of a special account; and, from its unique reception and adherence to the faith, as worthy of, if possible, a natural explanation of such action beyond the promptings of Divine grace, since its astonishing perseverance, its unswerving faith, form to-day as great a characteristic of the nation as they did on the day of its entry into the Christian Church. We proceed to examine, then, the kind of idolatry which its first apostle encountered on landing in the island, and the ease with which it was destroyed, so as to leave behind no poisonous shoots of the deadly root of evil. In order to understand the religious system of Ireland previous to the preaching of the Gospel, we must first take a general survey of polytheism, if it can be so called, in all Celtic countries, and of the peculiar character which it bore in Ireland itself.