Roman Catechism 24.35

Chapter 24 — Part III: The Decalogue — The First Commandment

Section 35. He will also inform the unlettered and those who may be ignorant of the use of images, that they are intended to instruct in the history of the Old and New Testaments, and to revive from time to time their memory; that thus, moved by the contemplation of heavenly things, we may be the more ardently inflamed to adore and love God Himself. He should, also, point out that the images of the Saints are placed in churches, not only to be honoured, but also that they may admonish us by their examples to imitate their lives and virtues.