Here is an extended quote from a great book by Linda Bergquist and Allan Karr. I hope to post a review for the book in the next week.

Today’s church has posed itself a serious challenge: to live according to its missional nature rather than simply organize around mission activities. This challenge is something of an antidote to the church’s previous practice of piecing together a theology out of the two “Great Commission” verses found in Matthew 28:18-20 and Acts 1:8 rather than from the entire biblical story.

When we miss the big picture — that God is forming a people for Himself and reconciling the world to Himself — it affects our ecclesiology and reduces mission to a program or department of a church. A century ago, the German theologian Martin Kahler said that mission was “the mother of theology” in that the theologizing of the early church was necessitated by its missionary encounters with the world. Over many years, other prophetic voices have tried to call us to a more authentic theology, but we have not always listened. In 1969, missiologist Heinrich Kastin wrote: “Mission was, in the early stages, more than a mere function; it was a fundamental expression of the life of the church. The beginnings of a missionary theology are therefore also the beginnings of Christian theology as such.”

As you design, refine, or re-align, these questions about the role of mission will be some of your most important decisions. Do you believe that missions are something that the church does, or that mission is something that the church intrinsically is? Your answer to this question either limits or releases people. It helps define whether the church seeks the lost, or whether we expect the lost to seek the church. Which will it be?

Church Turned Inside Out: A Guide For Designers, Refiners, And Re-Aligners by Linda Bergquist and Allan Karr