Caput I. DE ECCLESIAE MYSTERIOLumen gentium cum sit Christus, haec Sacrosancta Synodus, in Spiritu Sancto congregata, omnes homines This “Reflection and Discussion Guide” is intended to help small groups with their reading and prayerful reflection on the document and to focus discussion toward inclusion in the Lumen Gentium begins with the Church as mystery (rather than the Church’s hierarchical structures and government as did the documents of Vatican Council I) that is, the Lumen gentium, t