We are all connected, not only across nations and cultures and religions, but across time.  Even as we head into the future, we carry with us our ties to the past.  It’s how we orient ourselves and keep from getting lost, like Ariadne’s thread in the labyrinth.  As progressive Christians create new liturgies, they often build on treasures from the past — new lyrics to a well-known hymn-tune, a new setting of words from an ancient psalm.  Just another form of evolution.