Roman Catechism 16.124

Chapter 16 — Part II: The Sacraments — Baptism

Section 124. Their Importance — It now remains to explain, clearly and concisely, what is to be taught concerning the prayers, rites, and ceremonies of this Sacrament. To rites and ceremonies may, in some measure, be applied what the Apostle says of the gift of tongues, that it is unprofitable to speak, unless the faithful understand. They present an image, and convey the signification of the things that are done in the Sacrament; but if the people do not understand the force and meaning of these signs, there is but little advantage derived from ceremonies. Pastors should take care, therefore, to make them understood and to impress the minds of the faithful with a conviction that, although ceremonies are not of absolute necessity, they are of very great importance and deserve great veneration.