This is my comment on a blog where the blogger is repeating some debate about what communion really means and who has the authority to say so.
I'm not against dialogue and even vigorous debate, but the focus of many on who has "authority" and on definitions of terms is indicative of the weakness of human beings. Authority and word smithing are not what faith is about and the entire Bible is one's guide to understanding God's will. If you read the entire Bible and understand it both literally and conceptually, you will find that God taught humans three tools of faith: covenant, sacrifice, and witness. The Old Testament starts with God's covenant with Adam and Eve, where they have Eden plus God's physical presence so long as they obeyed his simple restrictions. They broke that covenant. Abel is then killed for his perfect sacrifice, which is the first mention of sacrifice in the Bible. God establishes covenants with Noah and with Abraham, and then the Israeli people through Moses. Jesus is the New Covenant, which fulfills the Old, but does not erase the tools of God. Jesus becomes the perfect sacrifice, which does not erase sacrifice, but fulfills the old form of bloody sacrifice with bloodless sacrifice once for all. He instructs the Apostles to continue to offer him as the bloodless sacrifice. And finally, witness is given by God to the people of the Old Testament, and there are readings (I have some on my web site) about how witness is THE tool of the Church. The Apostles, disciples, and the Early Fathers all faithfully carry through witness as taught to the Israelites by God. So people who argue today about who has authority and what words mean without looking at the three rivers of instruction and communication that flow from God and are utilized by Jesus Christ completely miss the point and understandably don't "get" the true Catholic Church.