From the Confession of St. Patrick:
"And there I wish to wait for His promise who surely never disappoints; as He promises in the Gospel: 'They will come from east and the west and they shall sit down with Abraham and Isaac and Jacob' - thus we believe that the faithful will come from the entire world.
For that reason we ought to fish well and with diligent care, as the Lord commands and teaches, saying: 'Follow Me, and I will make you fishers of men.'
This is why it was most necessary to spread our nets widely so that a great throng and multitude might be captured for God, and that there be clergy everywhere to baptize and teach a people who need and want so badly, as the Lord admonishes in the Gospel, saying: 'Go now and teaching all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all the things I have taught you; and see, I am with you all days, even until the end of the world.' And again He says: 'Go out therefore to the whole world and preach the Gospel to every creature. He who believes and is baptized shall be saved, but he who does not believe shall be condemned.' And again: 'This Gospel of the kingdom shall be preached in the entire world for a testimony to all races of people, and then shall the end come.' And so, too, the Lord announces through the prophet, and says, 'And it shall come to pass, in the last days, says the Lord, I will pour out my Spirit on all flesh, and your sons and your daughters shall prophesy, and our young man shall see visions, and you old ones shall dream dreams. And upon my manservants and maidservants I will pour our my Spirit, and thy, too, shall prophesy.'
Finally, in Hosea He says: 'I will call those who were not My people, My people; and those who have not received My mercy, they shall receive My mercy. And where before in the place where it was said, 'You are not my people,' there they shall be called children of the living God.'
This, then, is how the people of Ireland, who had never had any knowledge of God, but until now had cults and worshiped idols and abominations, have lately been turned into a people of the Lord and are called the children of God."