Every Sunday, we go to Mass to praise and worship God. The very word Eucharist means thanksgiving. We try our best all Mass to let God know how grateful we are. We offer him our very lives, in union with the eternal sacrifice of his Son on the cross. What more could we give him? What greater act of thanksgiving could there possibly be? There! We've finally thanked him sufficiently ...
... until ... he then turns around and gives his Son back to us in holy Communion! He did it again! We thank him … he gives us even more!
When Mary McCarthy said she believed the Eucharist to instead be just a symbol, Flannery O'Connor replied, Well, if it's a symbol, to hell with it.
Or, if it were just a symbol, we could have turkey with it.