So if anyone eats this bread and drinks from this cup of the Lord in an unworthy manner, he is guilty of sin against the body and the blood of the Lord. 

That is why a man should examine himself carefully before eating the bread and drinking from the cup.  
For if he eats the bread and drinks from the cup unworthily, not thinking about the body of Christ and what it means, he is eating and drinking God’s judgment upon himself; for he is trifling with the death of Christ.  

That is why many of you are weak and sick, and some have even died.