Ted Olsen’s short bio of the famous missionary to Ireland is inspiring:
Patrick was 16 years old in about the year 405, when he was captured in a raid and became a slave in what was still radically pagan Ireland. Far from home, he clung to the religion he had ignored as a teenager.
Patrick was in his mid-40s when he returned to Ireland. Palladius [sent to evangelize Ireland in 431] had not been very successful in his mission, and the returning former slave replaced him. Intimately familiar with the Irish clan system (his former master, Milchu, had been a chieftain), Patrick’s strategy was to convert chiefs first, who would then convert their clans through their influence. Reportedly, Milchu was one of his earliest converts.
Though he was not solely responsible for converting the island, Patrick was quite successful. He made missionary journeys all over Ireland, and it soon became known as one of Europe’s Christian centers. This, of course, was very important to fifth-century Christians, for whom Ireland was one of the “ends of the earth.”