Again, let me repeat the words of Jesus at the Last Supper, as recalled by the priest during the Eucharistic prayer at Mass:
"Take this, all of you, and eat of it, for this is my body which will be given up for you."
"Take this, all of you, and drink from it, for this is the chalice of my blood, the blood of the new and eternal covenant, which will be poured out for you and for many for the forgiveness of sins. Do this in memory of me."
What the Lord has said is astounding and earthshaking beyond words ~ I felt it during the consecration. He's offering himself to us! Bible Christians interpret the Bible literally, yet here they believe that Jesus only meant what he said symbolically. The Last Supper was too serious an occasion for the Lord to say anything he didn't really mean.