Another Prayer of Chrysostom
I believe, O Lord, and I confess that Thou art truly the Christ, the Son of the living God, Who came into the world to save sinners, of whom I am chief. Moreover, I believe that this is truly Thy most pure Body, and this is truly Thine Own precious Blood; wherefore, I pray Thee: Have mercy on me and forgive me my transgressions, voluntary and involuntary, whether in word or deed, in knowledge or in ignorance. And vouchsafe me to partake without condemnation of Thy most pure Mysteries, unto the remission of sins and life everlasting. Amen.
When coming to partake, say to thyself these lines of Metaphrastes: Behold, I approach the Divine Communion. O Creator, let me not be burnt by communicating, For Thou art Fire, consuming the unworthy. But, rather, purify me of all impurity.