This is The Body of Christ

Quoting myself from Addendum III

Therefore, we ought not simply point at one congregation and say, “This is the Body of Christ.” We also ought to point at a group of congregations—churches in communion fellowship with each other because of Christ’s sacramental presence—and say, “This group of churches, this communion fellowship, this institution is the Body of Christ.”

So Our Lord’s churchly presence is not unlike His physical or sacramental presence. Because Our Lord took flesh, we can and must point to Jesus and say, “This man is God.” Because of Our Lord’s Word and Spirit, we can and must point to the consecrated bread and say, “This bread is Christ’s Body.” In the same way, we can and must point to a communion fellowship that holds to the true faith and say, “This is the Body of Christ—God’s church on earth.”