Matthew 18 - tell it to the Church

"Paul's final greeting is to 'the church in your house.' In the New Testament, the word church is never used of a building. We have drifted so far from the teaching of the New Testament that some Christians now think they are not in a church unless they are in a church building, or at least affiliated with an organization that owns such a building. But in the New Testament, the church is a society that meets for the purpose of publicly worshiping God. All Christians, as members of Christ's body, which is the invisible church, are members of Christ's church. When some of them gather together for public worship in a particular place, they are called a particular church: in this case, 'the church in your house.' Just as the New Testament never uses the word church to refer to a building, so it never uses the word church to refer only to church officers. It does not even mention such officers or offices as popes, cardinals, episcopal bishops, archbishops, trustees, superintendents, assistant pastors, associate pastors, music ministers, or youth pastors. All those offices have been invented by men. The church in Philemon's house is the entire group of Christians that meets there for worship. They are all part of the ekklesia." - John Robbins, Slavery and Christianity