II. How is the Liturgy Celebrated?

From The Catechism of the Catholic Church

1146
Signs of the human world. In human life, signs and symbols occupy an important
place. As a being at once body and spirit, man expresses and perceives
spiritual realities through physical signs and symbols. As a social being, man
needs signs and symbols to communicate with others, through language, gestures,
and actions. the same holds true for his relationship with God.

PART TWO: THE CELEBRATION OF THE CHRISTIAN MYSTERY

SECTION ONE THE SACRAMENTAL ECONOMY
- CHAPTER TWO THE SACRAMENTAL CELEBRATION OF THE PASCHAL MYSTERY
  - Article 1 CELEBRATING THE CHURCH’S LITURGY
    - II. How is the Liturgy Celebrated?

From The Catechism of the Catholic Church – rosary.team