The church, the community of God in Christ has been called a "missional community". We are a community that shares in the mission of God in Christ in this world; we are on mission.
I believe this has to color everything else, but I also believe what we're coloring is important here. We must first define "mission" and not only that, but we must describe what it's all about. It includes but is more than just getting people "saved". In our zeal to do better we can leave the basic behind. And while we need to do better we must also hold on to the basic truth of salvation from the guilt, condemnation and power of sin and salvation to forgiveness, reconciliation and freedom, in Christ.
We're to be little christs in this world, but even more importantly we are the Body of Christ. We carry on to fulfill his once for all ministry in this world, in him by the Spirit, together. It's a ministry of being servants to all and as we have freely received, freely giving of ourselves to others.
There is much more to say here, of course. What might you like to add for now?