 but in the essentials that we're submitted together in the conviction that Jesus Christ is Lord, then they can become a member of this family. If John were talking about a literal house and not a church, then that would mean when that Jehovah's Witness knocks on your door or that Mormon knocks on your door that technically you're not to invite them in and have fellowship with them. Why would you not invite them in and have fellowship with them? Because they don't believe in the Jesus that you and I believe in.