I believe, Lord, and I confess that You are truly the Christ, the Son of the living God, who came into the world to save sinners, from whom I am the first. I also believe that this is Your most pure Body, and this is Your most honest Blood. I pray to You: have mercy on me, and forgive me my sins, voluntary and involuntary, in word, in deed, in knowledge and ignorance, and grant me uncondemned partake of Your most pure Sacraments, for the remission of sins and eternal life. Amen.
When you come to receive communion, mentally recite these verses of Metaphrast:
I now begin Divine Communion.
Creator, do not scorch me with communion:
For you are fire, unworthy to burn.
But cleanse me from all filth.
Then:
Thy secret supper this day, O Son of God, receive me as a partaker; I will not tell your enemies a secret, nor give you a kiss like Judas, but like a thief I will confess to you: remember me, Lord, in your kingdom.
And poems:
It is in vain to be horrified by the idolizing Blood:
There is fire, unworthy to burn.
The Divine Body both adores and nourishes me:
He loves the spirit, but he feeds the mind strangely.
Then the troparia:
You have sweetened me with love, O Christ, and you have changed me with Your Divine care; but my sins fell into immaterial fire, and I may be satisfied with the pleasures of You: let me exultingly magnify, O Blessed One, Your two comings.
In the light of Thy Saints, how is there an unworthy one? If I dare to go into the chamber, my clothes will convict me, as if I am not married, and I will be bound and cast out from the angels. Cleanse, Lord, the filth of my soul, and save me, as a Lover of Mankind.
Also prayer:
Master, Lover of Mankind, Lord Jesus Christ my God, let this Holy One not come into judgment for me, for I am unworthy to be: but for the purification and sanctification of the soul and body, and betrothal to the future life and kingdom. It is good for me, even if I cleave to God, to place the hope of my salvation in the Lord.
And one more thing:
Thy secret supper this day, O Son of God, receive me as a partaker; I will not tell your enemies a secret, nor give you a kiss like Judas, but like a thief I will confess to you: remember me, Lord, in your kingdom.