Here's a Celtic prayer of unknown origin. Though I know of no relationship it has to St. Patrick, yet this prayer seems to express the offer's confidence of God's presence and protection in every situation in a very Celtic manner.
Ancient Celtic prayer collected by Alexander Carmichael (1832-1912), published inCarmina Gadelica(Edinburgh: Floris Books, 1992). These are prayers, hymns, and incantations collected in the Highlands and Islands of Scotland in the 19th century.