“All that those quotes show is your ignorance of what the Catholic Church teaches on the Eucharist because none of it actually contradicts Church teaching.”
The Catholic church teaches transubstantiation, which is that the bread and the wine really do become the body of Christ. This is different from consubstantiation, and the symbolism of Augustine.
You’re free to demonstrate to me how “signifies” and “Is the body of Christ consumed?.. Perish the thought!” and “Believe, and thou has eaten already” support your “interpretation.”
In my Protestant world, words have meaning, context is important, etc.
I feel like I am dealing with a freshman (high school) theology class. The Church teaches that there is a difference between a substance and a property. The physical accidents of bread and wine do not change, but the substance of the bread and wine do. They change substance (transubstantiation).
It is not the properties of wood, or metal or plastic of a chair that make it a chair. It is an organization of those materials in a specific size and shape that make them a chair. It is not the collection of chemicals that make you a human, it is something greater, it is the properties of humaness that make you human.
Were you able to travel back in time and encounter Jesus, none of the modern forensic tools or the greatest physicians of our time could determine He is Divine from a physical examination of His body (properties). His substance was always divine and is the object of faith. It is the same with the Epiousious, the Eucharist.