An old and beautiful prayer. It is part of the Divine Liturgy of St. John Chrysostom within the Byzantine Rite of the Catholic Church. Note the call to the Trinity—O Lord, O Master, O Holy One.
O Lord, I believe and profess that You are truly Christ,
the Son of the living God,
Who came into the World to save sinners,
of whom I am the first.
Accept me as a partaker of your mystical supper,
O Son of God,
for I will not reveal Your mysteries to our enemies,
nor will I give you a kiss as did Judas,
but like the thief will I confess to You.
Remember me, O Lord,
when You shall come into Your kingdom.
Remember me, O Master,
when You shall come into Your kingdom.
Remember me, O Holy One,
when You shall come into Your kingdom.
May the partaking of your holy mysteries, O Lord,
be not for my judgment, or condemnation,
but for the healing of soul and body.
O Lord, I also believe and profess that this,
which I am about to receive,
is truly Your most precious Body
and Your life-giving Blood,
which I pray, make me worthy
to receive for the remission of all my sins
and for life everlasting. Amen
O God, be merciful to me a sinner.
God, cleanse my sins and have mercy on me.
O Lord forgive me for I have sinned without number.