From an upcoming article by Michael Gorman, an excerpt of which was recently posted on his blog:
We become what we practice. Our liturgical habits make it possible, or not, to live and tell the story faithfully, even naturally, over time. Churches that dispense with the telling of the story, perhaps in the interest of sensitivity to “seekers,” will eventually have nothing identifiably Christian to say, either to themselves or to those seekers. But since everyone, and every community, needs a master story, a new one will fill the void, and the new master story will carry with it a new, and most likely alien, ethic and mission. The final consequence of this creedal amnesia will be that the church has nothing left to live for or, if necessary, to die for, that faithfully embodies the story of Jesus.
How we worship - what we do, say and proclaim - is of crucial importance. It is forming us either into Christians or syncretists.