According to the American Catholic Website "Details of his [St. Patrick's] life are uncertain. Current research places his dates of birth and death a little later than earlier accounts. Patrick may have been born in Dunbarton, Scotland, Cumberland, England, or in northern Wales. He called himself both a Roman and a Briton. At 16, he and a large number of his father’s slaves and vassals were captured by Irish raiders and sold as slaves in Ireland. Forced to work as a shepherd, he suffered greatly from hunger and cold.
After six years, Patrick escaped, probably to France, and later returned to Britain at the age of 22. His captivity [lead him to] spiritual conversion... He was consecrated bishop at the age of 43. His great desire was to proclaim the Good News to the Irish...
Because of the island’s pagan background, Patrick was emphatic in encouraging widows to remain chaste and young women to consecrate their virginity to Christ. He ordained many priests, divided the country into dioceses, held Church councils, founded several monasteries and continually urged his people to greater holiness in Christ."
“Christ shield me this day: Christ with me, Christ before me, Christ behind me, Christ in me, Christ beneath me, Christ above me, Christ on my right, Christ on my left, Christ when I lie down, Christ when I arise, Christ in the heart of every person who thinks of me, Christ in the eye that sees me, Christ in the ear that hears me”.
(from “The Breastplate of St. Patrick”)