In "Keeping the Sabbath Wholly" by Marva J. Dawn (a book which I have read but do not own, and therefore can't quote precisely
), the author states that we are not merely to "go to church"; we are to "go and be church" to the world.
In "The Musician's Quest" by George MacDonald (a book which I have read and owned and then given away, and therefore can't quote precisely
), Robert Falconer discovers the One Church across the ages and nations, and since he is a member of this One Great Church he is not content to belong to any single building or parish.