St. Patrick’s Breastplate (sometimes called The Lorica of St. Patrick) is an ancient Irish prayer attributed to St. Patrick. The prayer first appears in the Liber Hymnorum, an 11th-century collection of Irish and Latin hymns, where it is said that Patrick sang these words when he was besieged by the anti-Christian chieftain Lóegaire.

The prayer’s most famous excerpt contains an invocation that Christ be “with me, before me, behind me, beneath me, above me, on my right, on my left, when I lie down, when I sit down, in the heart of every man who thinks of me, in the mouth of every man who speaks of me, in the eye that sees me, in the ear that hears me.” The prayer’s complete version can be divided into eleven sections, each calling upon different elements of divine protection, binding those who recite it to the strength of the Trinity.

©LPi

I arise today 
Through a mighty strength, the invocation of the Trinity,
Through belief in the Threeness,
Through confession of the Oneness
of the Creator of creation.

I arise today
Through the strength of Christ’s birth with His baptism,
Through the strength of His crucifixion with His burial,
Through the strength of His resurrection with His ascension,
Through the strength of His descent for the judgment of doom.

I arise today
Through the strength of the love of cherubim,
In the obedience of angels,
In the service of archangels,
In the hope of resurrection to meet with reward,
In the prayers of patriarchs,
In the predictions of prophets,
In the preaching of apostles,
In the faith of confessors,
In the innocence of holy virgins,
In the deeds of righteous men.

I arise today, through
The strength of heaven,
The light of the sun,
The radiance of the moon,
The splendor of fire,
The speed of lightning,
The swiftness of wind,
The depth of the sea,
The stability of the earth,
The firmness of rock.

I arise today, through
God’s strength to pilot me,
God’s might to uphold me,
God’s wisdom to guide me,
God’s eye to look before me,
God’s ear to hear me,
God’s word to speak for me,
God’s hand to guard me,
God’s shield to protect me,
God’s host to save me
From snares of devils,
From temptation of vices,
From everyone who shall wish me ill,
afar and near.

I summon today
All these powers between me and those evils,
Against every cruel and merciless power
that may oppose my body and soul,
Against incantations of false prophets,
Against black laws of pagandom,
Against false laws of heretics,
Against craft of idolatry,
Against spells of witches and smiths and wizards,
Against every knowledge that corrupts man’s body and soul;
Christ to shield me today
Against poison, against burning,
Against drowning, against wounding,
So that there may come to me an abundance of reward.

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 sit down,
Christ when I arise,
Christ in the heart of every man who thinks of me,
Christ in the mouth of everyone who speaks of me,
Christ in every eye that sees me,
Christ in every ear that hears me.

Prayer provided by https://www.ourcatholicprayers.com/st-patricks-breastplate.html