Roman Catechism 18.2

Chapter 18 — Part II: The Sacraments — The Holy Eucharist

Section 2. In order that the faithful, therefore, aware of the divine honours due to this heavenly Sacrament, may derive therefrom abundant fruit of grace and escape the most just anger of God, pastors should explain with the greatest diligence all those things which may seem calculated more fully to display its majesty.