Christ beside me, Christ before me

My wife and I will be taking a trip to Ireland next week (May 10th), and I've started doing some reading to get into the Irish spirit. I came across a prayer called 'St. Patrick's Breastplate" also called "The Deer's Cry". It is said that St. Patrick challenged the pagan High-King Laeghaire by lighting a fire during a festival where all fires were to be extinguished. Once all the fires were extinguished the king would light his fire to show that he alone would provide his people with light and fire. Since St. Patrick lit his fire to demonstrate that he had a light of his own to share, the king tried to ambush him but when the king came to where St Patrick had been he only saw a group of deer.

I
For my shield this day
A mighty power:
The Holy Trinity!
Affirming threeness,
Confessing oneness,
In the making of all
Through love...

II
For my shield this day I call:
Christ's power in his coming
and in his baptising,
Christ's power in his dying
On the cross, his arising
from the tomb, his ascending;
Christ's power in his coming
for judgement and ending.

III
For my shield this day I call:
strong power of the seraphim
with angels obeying,
and archangels attending,
in the glorious company
of the holy and risen ones,
in the prayers of the fathers,
in visions prophetic
and commands apostolic,
in the annals of witness,
in virginal innocence,
to the deeds of steadfast men.

IV
For my shield this day I call:
Heaven's might,
Moon's whiteness,
Fire's glory,
Lightning's swiftness,
Wind's wildness,
Ocean's depth,
Earth's solidity,
Rock's immobility.

V
This day I call to me:
God's strength to direct me,
God's power to sustain me,
God's wisdom to guide me,
God's vision to light me,
God's ear to my hearing,
God's word to my speaking,
God's hand to uphold me,
God's pathway before me,
God's shield to protect me,
God's legions to save me;
from snares of the demons,
from evil enticements,
from failings of nature,
from one man or many
that seek to destroy me,
anear or afar.

VI
Around me I gather;
these forces to save
my soul and my body
from dark powers that assail me:
against false prophesyings,
against pagan devisings,
against heretical lying
and false gods all around me.
Against spells cast by women (witches),
by blacksmiths, by Druids,
against knowledge unlawful
that injures the body,
that injures the spirit.

VII
Be Christ this day my strong protector:
against poison and burning
against drowning and wounding,
through reward wide and plenty...

Christ beside me, Christ before me;
Christ behind me, Christ within me;
Christ beneath me, Christ above me;
Christ to right of me, Christ to left of me;
Christ in my lying, my sitting, my rising;
Christ in heart of all who know me,
Christ on tongue of all who meet me,
Christ in eye of all who see me,
Christ in ear of all who hear me.

VIII
For my shield this day I call:
a mighty power:
the Holy Trinity!
affirming threeness,
confessing oneness
in the making of all - through love...

IX
For to the Lord belongs salvation,
and to the Lord belongs salvation
and to Christ belongs salvation.
May your salvation, Lord, be
with us always.

... translation by Neil Dermott O'Donoghue

And here is a shortened variation in Song...