Ireland, however, for four hundred years to come still poured out missionaries to Europe. They passed through England to northern France and the Netherlands; across the Gaulish sea and by the Loire to middle France; by the Rhine and the way of Luxeuil they entered Switzerland; and westward they reached out to the Elbe and the Danube, sending missionaries to Old Saxony, Thuringia, Bavaria, Salzburg and Carinthia; southwards they crossed the Alps into Italy, to Lucca, Fiesole, Rome, the hills of Naples, and Tarentum. Their monasteries formed rest-houses for travellers through France and Germany. Europe itself was too narrow for their ardour, and they journeyed to Jerusalem, settled in Carthage, and sailed to the discovery of Iceland. No church of any land has so noble a record in the astonishing work of its teachers, as they wandered over the ruined provinces of the empire among the pagan tribes of the invaders. In the Highlands they taught the Picts to compose hymns in their own tongue; in a monastery founded by them in Yorkshire was trained the first English poet in the new England; at St. Gall they drew up a Latin-German dictionary for the Germans of the Upper Rhine and Switzerland, and even devised new German words to express the new ideas of Christian civilisation; near Florence one of their saints taught the natives how to turn the course of a river. Probably in the seventh and eighth centuries no one in western Europe spoke Greek who was not Irish or taught by an Irishman. No land ever sent out such impassioned teachers of learning, and Charles the Great and his successors set them at the head of the chief schools throughout Europe.
We can only measure the originality of the Irish mission by comparing with it the work of other races. Roman civilisation had not inured its people to hardship, nor given them any interest in barbarians. When Augustine in 595 was sent on the English mission he turned back with loathing, and finally took a year for his journey. In 664 no one could be found in Rome to send to Canterbury, till in 668 Theodore was fetched from Syria; he also took a year on his way. But the Irish missionaries feared nothing, neither hunger nor weariness nor the outlaws of the woods. Their succession never ceased. The death of one apostle was but the coming of another. The English missions again could not compare with the Irish. Every English missionary from the seventh to the ninth century had been trained under Irish teachers or had been for years in Ireland, enveloped by the ardour of their fiery enthusiasm; when this powerful influence was set aside English mission work died down for a thousand years or so. The Irish missionaries continued without a break for over six hundred years. Instead of the Irish zeal for the welfare of all peoples whatsoever, the English felt a special call to preach among those "from whom the English race had its origin," and their chief mission was to their own stock in Frisia. Finally, among Teutonic peoples politics went hand in hand with Christianity. The Teutons were out to conquer, and in the lust of dominion a conqueror might make religion the sign of obedience, and enforce it by fire and water, viper and sword. But the Irish had no theory of dominion to push. A score of generations of missionaries were bred up in the tribal communities of Ireland, where men believed in voluntary union of men in a high tradition. Their method was one of persuasion for spiritual ends alone. The conception of human life that lay behind the tribal government and the tribal church of Ireland gave to the Irish mission in Europe a singular and lofty character. In the broad humanity that was the great distinction of their people persecution had no part. No war of religion stained their faith, and no barbarities to man.