Being outside the church is being in Satan’s domain. The Bible indicates that Satan is the “god of this world,” whereas the church is the expression of God’s kingdom on earth and is ruled by Christ, not Satan. Those who are in the world (i.e., outside of Christ) are in Satan’s domain and under his authority. Those who are in the church are under Christ’s authority (2 Corinthians 4:4; Ephesians 2:2; I John 5:19). Consequently, because Christ reigns supremely in the local church, it’s a dangerous thing for a believer not to be identified with one. When we function on our own, outside the church, we’re asking to be knocked around by Satan.
Wayne Mack