After the light of the Christian religion had made some way toward supplanting the ancient polytheism, the doctrine of two principles was broached; first by Marcion, who lived in the time of Adrian and Antonius Pius, early in the second century; and next by Manes, a hundred years later. He was a Persian slave, who was brought into Greece, where he taught this doctrine, since known by his name, having learned it, as is said, from Scythianus, an Arabian. The Manichean doctrines, afterwards called also Paulician, from a great teacher of them in the seventh century, were like almost all the heresies in the primitive church, soon mixed up with gross impurities of sacred rites as well as extravagant absurdities of creed. The Manicheans were, probably as much on this account as from the spirit of religious intolerance, early the objects of severe persecution; and the Code of Justinian itself denounces capital punishment against any of the sect, if found within the Roman dominions. It must be confessed that the theory of two principles, when kept free from the absurdities and impurities which were introduced into the Manichean doctrine, is not unnaturally adopted by men who have no aid from the light of revelation,[1] and who are confounded by the appearance of a world where evil and good are mixed together, or seem to struggle with one another, sometimes the one prevailing, and sometimes the other; and accordingly, in all countries, in the most barbarous nations, as well as among the most refined, we find plain traces of reflecting men having been driven to this solution of the difficulty.