“You cannot drink the cup of the Lord and the cup of demons too; you cannot have a part in both the Lord’s table and the table of demons. Are we trying to arouse the Lord’s jealousy? Are we stronger than he?” (Reference: 1 Corinthians 10:21-22 )
From the Brothers at Trieste “Concerning the memorial and Supper of the Lord Jesus Christ which he has ordered us to observe, we heartily confess and believe that all who desire to break the Lord’s bread as the memorial of Christ’s broken body, and all who desire to drink of this cup for the remembrance of the shed blood of Christ, must first be united by baptism to the one body of Christ of which Christ is the head. As Paul points out, we cannot at the same time participate in the Lord’s cup and the cup of devils (1 Cor. 10:21). This means that all those who have fellowship with the dead works of darkness have no part in the light.”
Modern Anabaptists/Mennonites have kept this thinking of the Brothers, that those who take Communion need to have already confessed their faith. Many times at baptisms Communion is held as a way of welcoming in the new believer – now the new believer is part of the faithful and can join them in commemorating Christ’s sacrifice. And because all are equal believers, anyone can serve Communion. This differs from other faiths. For example, the United Methodists allow anyone to partake of Communion if they come to the Communion table out of a desire to remember Christ and his life, death, and resurrection – but only recognized leaders can serve/bless Communion. And Roman Catholics have yet another system of conducting Communion.
But each denomination in the wider Christian faith holds to the idea that you cannot partake of the Lord’s table AND partake of what the demons of this world have to offer. It is an idea and basic tenet that is set forth, but I do not think all Christians understand the deep implications of it. That is part of the reason at each time of Communion modern Anabaptists/Mennonites examine their own lives, to make sure they come to the table as purified as possible.
I hope and pray beloved that you have made that intentional choice, and confirm that choice each time you partake of Communion. And may you find circles of faith that you can join with as we all come to the Lord’s Table. Selah!