Drew Goodmanson has some great thoughts here on what the church is and what it should be about:
When most people think of church, they envision a place where Christians gather on Sunday. A building dominates the mind of both Christians or non-believers. Today, the concept of church has been de-clawed of it's full of meaning. The gathered people of God (who once overthrew the most powerful empire that ever existed, without political, military or economic power) are now house broken.
Sadly, even most Christians have reduced the Church to a spiritual box. It's a place where our spiritual needs are met. We have compartmentalized our faith and removed it from the rest of our life. This is something more of us are thinking through, not how do we grow our church, but how are we going to change a city.