After this they had great encouragement under several emperors, particularly Constantine and Theodosius, and a very great work of God was carried on; but the ease and affluence which in these times attended the church, served to introduce a flood of corruption, which by degrees brought on the whole system of popery, by means of which all appeared to be lost again; and Satan set up his kingdom of darkness, deceit, and human authority over conscience, through all the Christian world.
In the time of Constantine, one Frumentius was sent to preach to the Indians, and met with great success. A young woman who was a Christian, being taken captive by the Iberians, or Georgians, near the Caspian Sea, informed them of the truths of Christianity, and was so much regarded that they sent to Constantine for ministers to come and preach the word to them. About the same time some barbarous nations having made irruptions into Thrace, carried away several Christians captive, who preached the gospel; by which means the inhabitants upon the Rhine, and the Danube, the Celtae, and some other parts of Gaul, were brought to embrace Christianity. About this time also James of Nisbia, went into Persia to strengthen the Christians, and preach to the heathens; and his success was so great that Adiabene was almost entirely Christian. About the year 372, one Moses, a Monk, went to preach to the Saracens, who then lived in Arabia, where he had great success; and at this time the Goths, and other northern nations, had the kingdom of Christ further extended amongst them, but which was very soon corrupted with Arianism.
Soon after this the kingdom of Christ was further extended among the Scythian Nomades, beyond the Danube, and about the year 430, a people called the Burgundians, received the gospel. Four years after, that Palladius was sent to preach in Scotland, and the next year Patrick was sent from Scotland to preach to the Irish who before his time were totally uncivilized, and, some say, cannibals; he however, was useful, and laid the foundations of several churches in Ireland. Presently after this, truth spread further among the Saracens, and in 522, Zathus, king of the Colchians encouraged it, and many of that nation were converted to Christianity. About this time also the work was extended in Ireland, by Finian, and in Scotland by Constantine and Columba; the latter of whom preached also to the Picts, and Brudaeus, their king, with several others, were converted. About 541, Adad, the king of Ethiopia, was converted by the preaching of Mansionarius; the Heruli beyond the Danube, were now made obedient to the faith, and the Abasgi, near the Caucasian Mountains.