When he spoke of drinking unworthily, he was talking of the folks who had a party and ate and drank and didn't respect communion. If you take it in that frame of mind, you can get very ill and even die. (I don't know exactly where that is in the Bible but it's there.) That's why we confess our sins so that our hearts will be right with him and with others.
Christ's church is the body of Christ, all believers, not just one particular denomination. Some day you will find that out, hopefully. Love, M
I believe the relevant verses usually discussed/debated on this subject include (though not limited to):
"Truly, truly, I say to you, unless you eat the flesh of the Son of man and drink his blood, you have no life in you; he who eats my flesh and drinks my blood has eternal life, and I will raise him up at the last day. For my flesh is food indeed, and my blood is drink indeed. He who eats my flesh and drinks my blood abides in me, and I in him" (John 6:53–56).
"Therefore whoever eats the bread and drinks the cup of the Lord unworthily will have to answer for the body and blood of the Lord. . . . For any one who eats and drinks without discerning the body, eats and drinks judgment on himself" (1 Cor. 11:27, 29)
And welcome to the thread...
It is 1 Corinthians 11. You are correct, the main distinction is between those who treat the eucharist as a happy meal and the proper way. But he also, in v. 29 speaks of the body of the Lord present in the Eucharist. My remarl was to a poster who advised me to approach the Lord "boldly". I posted from Cor 11 where that boldness is explained not be confused with lack of reverence, or else it becomes onto condemnation.