V
Vico
Guest
The moment and method appear to be explicitly stated in the Divine Liturgy of St. John Chrysostom:Moreover, we offer to you this spiritual and unbloody sacrifice; and we implore, pray, and entreat you: send down your Holy Spirit upon us and upon these gifts lying before us. … + And make this bread the precious body of your Christ. … + And that which is in this chalice the precious blood of your Christ. … + Changing them by your Holy Spirit. … That for those who partake of them they may bring about a spirit of vigilance, the remission of sins, the communion of your Holy Spirit, the fullness of the heavenly kingdom, and confidence in you, not judgment or condemnation. (The celebrant, concelebrants, and deacon together make a profound bow.)My understanding is that the Eastern approach is more along the lines of simply saying it is the body of Christ, now open your mouth, rather than coming up with complicated intellectual abstractions of what exactly that means or when exactly it becomes the body of Christ, none of that intellectualization is really what is important, what is important is recieiving Christ.