O Lord Jesus Christ my God, absolve, loose, cleanse and forgive me Thy sinful and useless and unworthy servant my errors, transgressions and sinful failing as many as I have committed from my youth up to this present day and hour, consciously and unconsciously, in words or actions or reasonings, thoughts, pursuits and in all my senses. By the prayers of Thy Mother the most pure and ever-virgin Mary who gave birth to Thee without human seed, my only hope which will not put me to shame, my intercessor and salvation, grant me to have communion without condemnation of Thy most pure, immortal, life-creating and awesome mysteries; for the remission of sins and unto life everlasting; for sanctification, enlightenment, strength, healing and health of soul and body; for the most perfect removal and destruction of my evil thoughts and reasonings and intentions, fantasies by night, brought by dark and evil spirits; for Thine is the Kingdom and the power and the glory and the honor and the worship with the Father and Thy Holy Spirit, now and ever and unto ages of ages. Amen.
10th Prayer, of St. John of Damascus
I stand before the doors of Thy temple, and I do not forsake my wicked thoughts. But, O Christ my God, as Thou hast justified the tax-collector, and hast had mercy on the woman of Canaan and hast opened the gates of paradise to the thief, open to me the interior depths of Thy love for mankind and receive me as I come and repent before Thee. Receive me as Thou didst receive the sinful woman and the woman with the flow of blood. For the first embraced Thy most pure feet and received the forgiveness of her sins, and the second just touched the hem of Thy garment and received healing. But I who am lost, daring to receive Thy whole Body, may I not be burned; but receive me as Thou hast received them, and enlighten my spiritual senses, burning up my spiritual faults by the prayers of her who gave birth to Thee without human seed, and of the heavenly angelic powers, for Thou art blessed unto ages of ages. Amen.
Another Prayer of St. John Chrysostom
I believe, O Lord, and I confess that Thou art truly the Christ, the Son of the living God Who camest into the world to save sinners, of whom I am first. I believe also that this is truly Thine own most pure Body, and that this is truly Thine own precious Blood. Therefore, I pray Thee: have mercy upon me and forgive my transgressions both voluntary and involuntary, of word and of deed, committed in knowledge or in ignorance. And make me worthy to partake without condemnation of Thy most pure Mysteries, for the remission of my sins, and unto life everlasting. Amen.
As you approach to partake, say silently the following verses of Metaphrastes:
Behold: I draw near to the Divine Communion.
Burn me not as I partake, O Creator,
For Thou art a Fire which burns the unworthy.
Rather, cleanse me of all defilement.