III. The Holy Spirit and the Church in the Liturgy

From The Catechism of the Catholic Church

You ask how the bread becomes the Body of Christ, and the wine . . . the
Blood of Christ I shall tell you: the Holy Spirit comes upon them and
accomplishes what surpasses every word and thought . . . Let it be enough for you
to understand that it is by the Holy Spirit, just as it was of the Holy Virgin
and by the Holy Spirit that the Lord, through and in himself, took
flesh.²⁴

PART TWO: THE CELEBRATION OF THE CHRISTIAN MYSTERY

SECTION ONE THE SACRAMENTAL ECONOMY
- CHAPTER ONE THE PASCHAL MYSTERY IN THE AGE OF THE CHURCH
  - Article 1 THE LITURGY – WORK OF THE HOLY TRINITY
    - III. The Holy Spirit and the Church in the Liturgy

From The Catechism of the Catholic Church – rosary.team