1 Corinthians 11:27

Wherefore whosoever shall eat this bread, and drink this cup of the Lord... — Better, Wherefore, whosoever eats the bread or drinks the cup of the Lord. The entire weight of MS. evidence is in favour of the conjunction “or,” not “and,” which was probably retained in the English version lest the disjunctive “or” might seem to favour the practice of receiving in one kind only. It is, however, clear that if in these early days there was a considerable interval between the receiving the bread and the wine, it would have been quite possible for a partaker to have received one only unworthily, and the Apostle intimates that in either case he is guilty.

Sin was the cause of that body being broken and that blood shed, and therefore the one who unworthily uses the symbols of them becomes a participator in the very guilt of those who crucified that body and shed that blood.