The same series of transformations took place elsewhere with a number of other gods.[29] The Mithra worship was thus formed, in the main, by a combination of Persian beliefs with Semitic theology, incidentally including certain elements from the native cults of Asia Minor. The Greeks later translated the names of the Persian divinities into their language and imposed certain forms of their mysteries on the Mazdean cult.[30] Hellenic art lent to the Yazatas that idealized form in which it liked to represent the immortals, and philosophy, especially that of the Stoics, endeavored to discover its own physical and metaphysical theories in the traditions of the magi. But in spite of all these accommodations, adaptations and interpretations, Mithraism always remained in substance a Mazdaism blended with Chaldeanism, that is to say, essentially a barbarian religion. It certainly was far less Hellenized than the Alexandrian cult of Isis and Serapis, or even that of the Great Mother of Pessinus. For that reason it always seemed unacceptable to the Greek world, from which it continued to be almost completely excluded. Even language furnishes a curious proof of that fact. Greek contains a number of theophorous ([Greek: theophoros], god-bearing) names formed from those of Egyptian or Phrygian gods, like Serapion, Metrodoros, Metrophilos--Isidore is in use at the present day--but all known derivations of Mithra are of barbarian formation. The Greeks never admitted the god of their hereditary enemies, and the great centers of Hellenic {149} civilization escaped his influence and he theirs.[31] Mithraism passed directly from Asia into the Latin world. There it spread with lightning rapidity from the time it was first introduced. When the progressive march of the Romans toward the Euphrates enabled them to investigate the sacred trust transmitted by Persia to the magi of Asia Minor, and when they became acquainted with the Mazdean beliefs which had matured in the seclusion of the Anatolian mountains, they adopted them with enthusiasm. The Persian cult was spread by the soldiers along the entire length of the frontiers towards the end of the first century and left numerous traces around the camps of the Danube and the Rhine, near the stations along the wall of Britain, and in the vicinity of the army posts scattered along the borders of the Sahara or in the valleys of the Asturias. At the same time the Asiatic merchants introduced it in the ports of the Mediterranean, along the great waterways and roads, and in all commercial cities. It also possessed missionaries in the Oriental slaves who were to be found everywhere, engaging in every pursuit, employed in the public service as well as in domestic work, in the cultivation of land as well as in financial and mining enterprises, and above all in the imperial service, where they filled the offices.