This book makes a bold claim: "Every church should be a church-planting church; every church without exception." (71). While one might quibble with this statement for one reason or another, there is no denying, as this book so persuasively argues, that the Great Commission is fulfilled not just in one-on-one, individualistic evangelistic encounters, but primarily through the planting of local congregations.
Given the evidence presented here, primarily from the book of Acts, it is indeed peculiar that so many churches, especially large churches with masses of people and abundant resources, for some reason do not give themselves to the task of church planting (177). Certainly there is sorrow and sacrifice in sending people out (Acts 13:1-3), but if the Holy Spirit is indeed a "church-planting Spirit" (71), can we afford to do otherwise?
If you wonder why church planting is important, especially since so many churches already exist, read this book. "The fruit of the gospel is communities of light invading the darkness and dispelling the oppressive gloom of chaos and disorder. This is church planting and this is how glorious it is." (68).