The vigorous, continual planting of new congregations is the single most crucial strategy for the numerical growth of the Body of Christ, the renewal of existing churches, and the overall impact of that Body on the culture of any city.
Nothing else—neither crusades, outreach programs, para-church ministries, mega-churches, consulting, nor church renewal processes— will have the consistent impact that dynamic, extensive church planting has. This is an eyebrow raising statement, I know. But to those who have done any study of the subject, it is not even controversial.
Tim Keller, The Cutting Edge Magazine (Vol. 9:2)