Paragraph 3. THE CHURCH IS ONE, HOLY, CATHOLIC, AND APOSTOLIC

From The Catechism of the Catholic Church

813
The Church is one because of her source: “the highest exemplar and source
of this mystery is the unity, in the Trinity of Persons, of one God, the Father
and the Son in the Holy Spirit.”²⁵⁹ The Church is one because of
her founder: for “the Word made flesh, the prince of peace, reconciled all
men to God by the cross, . . . restoring the unity of all in one people and one
body.”²⁶⁰ The Church is one because of her “soul”:
“It is the Holy Spirit, dwelling in those who believe and pervading and
ruling over the entire Church, who brings about that wonderful communion of the
faithful and joins them together so intimately in Christ that he is the
principle of the Church’s unity.”²⁶¹ Unity is of the essence of
the Church:

PART ONE: THE PROFESSION OF FAITH

SECTION TWO I. THE CREEDS
- CHAPTER THREE I BELIEVE IN THE HOLY SPIRIT
  - Article 9 “I BELIEVE IN THE HOLY CATHOLIC CHURCH”
    - Paragraph 3. THE CHURCH IS ONE, HOLY, CATHOLIC, AND APOSTOLIC

From The Catechism of the Catholic Church – rosary.team