Silly me, I thought GOD was the final authority.
Matt 28:18 Then Jesus came to them and said, “All authority in heaven and ON earth has been given to Me.”
You said, Paul did not say “somber moment of remembrance.
He said that they should ‘discern the body of the Lord’ in the Eucharist (I Cor 11:29.).
By the same token Paul didn’t say Eucharist either. For that matter “Eucharist” isn’t even found in the index in my Bible. It must be a different one than you have.
“...for the same error the so-called reformers teach today.”
Oh, you mean those heathens who serve Satan? What an education this has been. Now I’m going back to reading an article about the former Priest who managed to find his way out of the darkness and into the Light.
God instituted the Catohlic Church to be authority on earth. Your question was how do you tell what is symbolic from what is literal. The answer is, read the commentary by the bishops and doctors of the Church.
“Eucharist” isn’t even found in the index in my Bible
Nor is "trinity" or "faith alone". Oops, that last one is in the Bible, where it is negated. The issue is not words but that St. Paul teaches the Catholic doctrine of Real Presence in 1 Cor 11.
There were true reform movements in the Church. St. Anthony, St. Athanasius, Leo the Great, St. Francis and St. Dominic were reformers. Leo XIII, Paul VI, John Paul II were reformers (we often wish the latter two were less so). Not all reform is bad, just a fake one undertaken in 15c by Luther and Calvin to destroy the faith of the Fathers. That is why it failed.