Ye do err, not knowing the scriptures, nor the power of God.
All your supposed points have been used in the past to undermine the doctrine of the Trinity. Do you reject the Trinity, too? If not, then on what basis do you reject the doctrine of the Real Presence, and why do you zero in on "remembrance" while rejecting "DO THIS?"
"11 Day after day every priest stands and performs his religious duties; again and again he offers the same sacrifices, which can never take away sins. 12 But when this priest , he sat down at the right hand of God. 13 Since that time he waits for his enemies to be made his footstool, 14 because by one sacrifice he has made perfect forever those who are being made holy."
I've had some explain that God is not affected by time, and therefor the one sacrifice, to God, is always ongoing. However, God is the One using the past tense - not me.
I know the scriptures. What took place at the Last Supper and at the cross? The Lords Supper the establishment of The New Covenant. "This is my body" replacing the Lamb and "this is my blood" replacing the blood placed on the door and also the sign of a Blood Covenant of which is not dependent upon man to fulfill but rather GOD Himself. The bread is just that it is bread as the wine is just that it is wine it is a TOKEN or a way to remember or to honor.
The presence of Christ or The Holy Spirit can come at any time at any place. It can happen in a church or in a hospital room. Why do people believe that the only way to achieve such is through rituals? Have you ever felt the very presence of such? It is a very overcoming experience and can be a very peaceful one as well. The peace that surpasses all understanding a comfort within not obtainable by any worldly means.
I don't reject "Do This". But I do understand that is established for our benefit so we remind ourselves of the price that was paid for us. Paul taught how it was to be done. Christ presence is where two or more are gathered in His name. The words Christ spoke was so the Disciples would understand who he was and what His death on the cross actually meant. When they took the bread and wine at the Last Supper to them it was part of the Passover Feast. They did not understand. When Christ appeared to them after His resurrection and offered them bread and wine they understood what had happened. It was only then they knew what The Lamb of GOD meant.
The Lamb as by Hebrew tradition was without blemish, lived among them away from the other lambs, and the family was close to the Lamb. The sacrificial Lamb was not plucked from a field it was picked way in advance and kept close with the family. In today's sense it was like killing a beloved pet. This was done so they would feel remorse for their sins that caused the required death of the Lamb at the Passover Feast. Thus the reason Paul instructed the churches in question about The Lord's Supper. It is the Gentile equivalent of The Passover Feast from the Laws of Moses.