The Cup of Blessing That We Bless, Is It Not a Representation of Christ?

Luther says that the root of all sin is idolatry. If we weren't committing idolatry, then all the other commandments we'd be holding. We who are many, are one body, for we all partake of the one bread. That's what it is. This, if we can stress anything, you're not the answer, but god is. And so he goes on, therefore, my beloved, flee from idolatries. I speak as to sensible people. Judge for yourselves what i say.