Can that also be interpreted symbolically in terms of the power of symbols to act on the human mind. Here we are inviting trouble if we not careful. It is a mine field of misunderstanding and divisive disagreement among Christians, but let me risk a little for the sake of more faithful discipleship and the hope of future unity. For the kingdom of God is not food and drink but righteousness and peace and joy in the Holy Spirit. It was because some sincere Christians saw that it was the spiritual qualities of righteousness and peace and joy in the Holy Spirit that really mattered that they decided centuries ago not to celebrate the Lord's Supper.
Quakers are a good example.
The Salvation Army might say they have something similar. If you allow the kind of freedom that Paul did you might even say that the direct command of Jesus to Do this in remembrance of me could be interpreted in a spiritual sense rather than in a literal physical sense. Do this in remembrance of me. Very truly, I tell you, whoever believes has eternal life. It is very direct and definite.