An Irish prayer attributed to St. Patrick and often refered to as the "breastplate" of St. Patrick-words that shield. 

I arise today through the strength of heaven

Light of the sun slendor of fire swiftness of wind depth of the sea
stability of earth firmness of rock, I arise today through GODs' might to uphold me GODs' wisdom to guide me GODs' hand to guard me Afar and anear alone or in a multitude Christ shield me today against wounding Christ with me Christ before me Christ behind me Christ on my right Christ on my left Christ beneath me Christ above me Christ in me. I arise today through the Mighty strength of the LORD of Creation.