The problem is understanding correctly what the scriptures teach. What helps tremendously is to see if other writings shed some light on this. Only Paul mentions the last supper and he says nothing in support of the catholic posiiton.
zerocrossing
Okay, so 2000 years worth of Christianity down the drain. The ancient Church got its understanding of the Eucharist as the Body and Blood of Christ all wrong. The martyr St. Ignatius, who was a disciple of John’s (the source of John 6), had no understanding of what John was talking about. The entire ancient Church was all in darkness because it understood the Eucharist to be the Body and Blood of the Lord. All we needed was the “light” of Protestant rationalism to set us all straight. Wow.