Christ’s mission. Each church understands itself as being the missionary in its particular neighborhood. The exponential key to evangelistic growth is not in church growth, but is found in church multiplication. In his book, Houses That Change the World, Wolfgang Simson suggests a new growth principle. Rather than focusing on growing churches past the 200-barrier, Simson urges churches to keep beneath what he calls the “Twenty Barrier.” He suggests that the key to church multiplication is to keep