There were especially two ideas whereon it rested, and from which it obtained a peculiar strength and a peculiar direction. The one was the belief that as the dominion of Rome was universal, so must it be eternal. Nothing like it had been seen before. The empire of Alexander had lasted a short lifetime; and within its wide compass were included many arid wastes, and many tracts where none but the roving savage had ever set foot. That of the Italian city had for fourteen generations embraced all the most wealthy and populous regions of the civilized world, and had laid the foundations of its power so deep that they seemed destined to last for ever. If Rome moved slowly for a time, her foot was always planted firmly: the ease and swiftness of her later conquests proved the solidity of the earlier; and to her, more justly than to his own city, might the boast of the Athenian historian be applied: that she advanced farthest in prosperity, and in adversity drew back the least. From the end of the republican period her poets, her orators, her jurists, ceased not to repeat the claim of world-dominion, and confidently predict its eternity[18]. The proud belief of his countrymen which Virgil had expressed-- 'His ego nec metas rerum, nec tempora pono: Imperium sine fine dedi'-- was shared by the early Christians when they prayed for the persecuting power whose fall would bring Antichrist upon earth. Lactantius writes: 'When Rome the head of the world shall have fallen, who can doubt that the end is come of human things, aye, of the earth itself. She, she alone is the state by which all things are upheld even until now; wherefore let us make prayers and supplications to the God of heaven, if indeed his decrees and his purposes can be delayed, that that hateful tyrant come not sooner than we look for, he for whom are reserved fearful deeds, who shall pluck out that eye in whose extinction the world itself shall perish[19].' With the triumph of Christianity this belief had found a new basis. For as the Empire had decayed, the Church had grown stronger; and now while the one, trembling at the approach of the destroyer, saw province after province torn away, the other, rising in stately youth, prepared to fill her place and govern in her name, and in doing so, to adopt and sanctify and propagate anew the notion of a universal and unending state. [Sidenote: Sanctity of the imperial name.]