How so? If you read "This is my body...etc" and see only "eat the bread," then you do indeed have a reading comprehension problem.
Again, It makes me think of the magic -- sacrament polarity or the 'conjuring' -- 'asking and receiving' polarity.
It seems that there's a lingering thought that the spell must be wound up properly or it won't work. That,to me, seems like a parody of what we say about 'confecting' the Sacrament, rather than a portrayal of it.