There are many things that are quite puzzling about Christianity to those who dwell on the outside when they look in. This is especially the case when we refer to the classic and historic worship forms of Christianity.
Those of us who practice the ancient faith do strange things like: process while carrying the Bible, banners, and crosses; we light candles, & use large amounts of incense; our clergy & altar servers dress as if they were already in the heavens. And if all of this were not strange enough, we say words that were written thousands of years ago, & we sing songs that span the 2000 (to 3500) year history of the church. And we even celebrate days on a calendar that no one in our country seems to know anything about.
We obviously belong to another rhythm of time. Our worship exposes to the watching world that we are aliens. To the outside observer, this kind of experience can be very appealing or very mystifying. In either case, it is obvious to all our worship has within it many layers of meaning. Meaning which is not easily apprehended by the biblically illiterate. Historic worship requires a new mind, heart, and soul, one shaped by another world, a spiritual world where God gives himself to us. For the reason we above all people should be eager to share our spiritual culture with all who will listen.
Consequently, it is imperative that churches that practice the ancient way of worship invest deeply in the training of their people. The mission work for historic churches (& thus the churches of the future) must focus on exposing the uninitiated to that other world that we know by every means possible: we must teach the bible, the Fathers, the councils, the songs, the prayers, the iconography, & the great books. It is by passing down the one faith in its fullness (no subtractions) that the Spirit begins to have his way with us. Historic churches are not to be museums, but rahter living and active, always at work in the molding of persons into the image of the Son of God.