We can only disagree here. Given this disagreement, how are we to know whose opinion is true? Would our Lord institute such an important sacrament and yet leave us in the dark as to what it means? This is the problem with sola scriptura. Without an authoritative teaching church instituted by Jesus himself there is no way to settle this dispute.
IfF you deny Jesus’s clear teaching then it is impossible to awaken you to the Truth of what He declared. But it is found in the scriptures, explained and repeated by Jesus Himself, what He means with bread and wine and water and BRASS SERPENTS. All of these teachings by Jesus are found in John’s Gospel. The explanation for the Brass serpent int he desert of Moses leadership is not even found in the Old Testament. It awaited Jesus explaining the meaning in John’s Gospel! If you read the explanation Jesus gave to Nicodemus and come away believing it is not plain or that Brass serpents can save people from snake bite venom, well then we cannot help your working so hard to remain blind to The Truth.