Thanks everyone, these are some really great thoughts and a lot to ponder during the next liturgy. Burl, I think I have reread your thoughts a half-dozen times already. It is interesting how even years after leaving my childhood religion, the modes of thinking I learned there still have so much influence over me. I had always been taught that taking the sacrament (our word for Eucharist) was a renewal of baptismal covenants. You had to be worthy to do so, and a big part of worthiness was acceptance of the church's doctrines. Now it seems difficult to abandon that mindset.
The Episcopal church I have been attending has been very welcoming and not pushed me in one direction or another, explicitly allowing me to find my own path. I have been happily accepting a blessing in lieu of the bread and wine since I started attending.
One other interpretation I recently read that I liked simply referred to the taking of the bread and wine as a commonly shared experience, unifying all Christians, of many different backgrounds, beliefs and modes of thinking dating back to the last supper. I remember when living abroad, I watched a live television program, knowing that my family back home was watching the exact same program at the exact same time. This did help me to feel more connected to them, even halfway across the world.
Regards,
Joseph