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.
Be the eye of God betwixt me and each eye,
The purpose of God betwixt me and each purpose,
The hand of God betwixt me and each hand,
The shield of God betwixt me and each shield,
The desire of God betwixt me and each desire,
The bridle of God betwixt me and each bridle,
And no mouth can curse me.
Ancient Celtic prayer collected by Alexander Carmichael (1832-1912), published in Carmina Gadelica (Edinburgh: Floris Books, 1992). These are prayers, hymns, and incantations collected in the Highlands and Islands of Scotland in the 18th century.