But these delicate and complicated researches into origins and relationships belong especially to the history of the Alexandrian period. In considering the Roman empire, the principal fact is that the Oriental religions propagated doctrines, previous to and later side by side with Christianity, that acquired with it universal authority at the decline of the ancient world. The preaching of the Asiatic priests also unwittingly prepared for the triumph of the church which put its stamp on the work at which they had unconsciously labored. Through their popular propaganda they had completely disintegrated the ancient national faith of the Romans, while at the same time the Caesars had gradually destroyed the political particularism. After their advent it was no longer necessary for religion to be connected with a state in order to become universal. Religion was no longer regarded as a public duty, but as a personal obligation; no longer did it subordinate the individual to the city-state, but pretended above all to assure his welfare in this world and especially in the world to come. The Oriental mysteries offered their votaries radiant perspectives of eternal happiness. Thus the focus of morality was changed. The aim became to realize the sovereign good in the life hereafter instead of in this world, as the Greek philosophy had done. No longer did man act in view of tangible {xxiii} realities, but to attain ideal hopes. Existence in this life was regarded as a preparation for a sanctified life, as a trial whose outcome was to be either everlasting happiness or everlasting pain. As we see, the entire system of ethical values was overturned. The salvation of the soul, which had become the one great human care, was especially promised in these mysteries upon the accurate performance of the sacred ceremonies. The rites possessed a power of purification and redemption. They made man better and freed him from the dominion of hostile spirits. Consequently, religion was a singularly important and absorbing matter, and the liturgy could be performed only by a clergy devoting itself entirely to the task. The Asiatic gods exacted undivided service; their priests were no longer magistrates, scarcely citizens. They devoted themselves unreservedly to their ministry, and demanded of their adherents submission to their sacred authority.