I would agree .But how would you know if what you are doing is not unworthily? It would seem it would have to be defined if we want to confess it rightly.
What is the spiritual meaning of drink the blood as it relates to the Son of man ?.How can we be sure we are eating by faith, a shadow?
Some make it (transubstantiation) into a fountain of youth as if literal blood was a source. .
Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord.1 Corinthians 11:27