What did Jesus say?
Jesus Christ, the Son of Man, the Son of God, the Alpha and the Omega, said:

"I am that bread of life... I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life.... Verily, verily, I say unto you, before Abraham was, I am.... I am the door: by me if any man enter in, he shall be saved, and shall go in and out, and find pasture.... I am the good shepherd: the good Shepherd giveth his life for the sheep..... I am the resurrection, and the life: he that believes in me, though he were dead, yet shall he live.... I am the way, the truth, and the life: no man cometh unto the Father, but by me.... I am the true vine, and my Father is the husbandman."

The Gospel according to St. John 6:48, 8:12, 8:58, 10:9, 10:11, 11:25, 14:6, and 15:1.

What did St. Patrick say?
St. Patrick said in the 4th century:

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 in the heart of every man who thinks of me,
Christ in the mouth of every man who speaks of me,
Christ in the eye that sees me,
Christ in the ear that hears me.

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