This quote my help here for the discussion;
Quote by 1st. century, St. Ignatius of Antioch; (Shun schisms, as the source of troubles.)** "Let all follow the bishop as Jesus Christ did the Father, and the priests, as you would the Apostles. Reverence the deacon as you would the command of God.** Apart for the bishop, let no one perform any of the functions that pertain to the Church. Let that Eucharist be held valid which is offered by the bishop or by one to whom the bishop has committed this charge. Wherever the bishop appears, there let the people be: as wherever Jesus Christ is, there is the Catholic Church. It is not lawful to baptize or give communion without the consent of the bishop. On the other hand, whatever has his approval is pleasing to God. Thus, whatever is done will be safe and valid.
Letter to the Smyrnaeans, Chap. 8
One should be careful to discern the body and blood of Christ before celebrating the communion. Here is St.Paul applying a curse to those who don’t discern the true body, blood of the Eucharist;
1Corinthians 11:23
11 For I received from the Lord what I also handed on to you, that the Lord Jesus, on the night he was handed over, took bread,
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and, after he had given thanks, broke it and said, “This is my body that is for you. Do this in remembrance of me.”
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In the same way also the cup, after supper, saying, “This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me.”
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For as often as you eat this bread and drink the cup, you proclaim the death of the Lord until he comes.
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Therefore whoever eats the bread or drinks the cup of the Lord unworthily will have to answer for the body and blood of the Lord. 12
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A person should examine himself, 13 and so eat the bread and drink the cup.
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**For anyone who eats and drinks without discerning the body, eats and drinks judgment 14 on himself. **
Peace be with you