Roman Catechism 23.18

Chapter 23 — Part III: The Decalogue — Introduction on the Commandments in General

Section 18. The Observance Of The Commandments Is Attended By Many Blessings — Finally, to leave nothing unsaid that may be calculated to induce the faithful to an observance of the law, the pastor should point out how abundant and sweet are its fruits. This he will easily accomplish by referring to the eighteenth Psalm, which celebrates the praises of the divine law. The highest eulogy of the law is that it proclaims the glory and the majesty of God more eloquently than even the heavenly bodies, whose beauty and order excite the admiration of all peoples, even the most uncivilised, and compel them to acknowledge the glory, wisdom and power of the Creator and Architect of the universe.