A church is a surprisingly difficult thing to just pick up and move. I'm not just talking about the physical building. If you've ever tried to get a entire group of people to move (be it spiritually, ideologically, or theologically), you wold probably agree that, at times, it might just be easier to move the physical church - but we can't.
Churches must grow where they are planted. Digging them up with all of the roots that have been established and moving them to a new location is amazingly difficult and in the rare cases that attempt it, frequently they are not ever able to fully take root, so they eventually wither away. There are exceptions, of course, but they are rare.
Growing a church organically, takes very seriously the idea that God has planted a church where it is. It takes very seriously the idea that God has carefully placed the church where it can not only be watered but can provide sustenance.
Considering the realities about the Church that were mentioned in the first three parts of this series, that would seem to be a little bit of a problem. As society has changed the Church hasn't. We have decentralized ourselves from the lives of a great deal of our communities. Ultimately, we have turned inward for stability and comfort. The more we cling to our past and ourselves, the more the communities in which we are planted have found us to be irrelevant for their lives.
In that situation, the Church is neither likely to be watered by or provide spiritual sustenance for the community. We have to begin reengaging our communities and the first step, quite naturally is to stop clinging to our past and ourselves and, instead, engage in our present and our communities.