Chapter 26 — Part III: The Decalogue — The Third Commandment
Section 3. The importance of its observance for the faithful may be inferred from the consideration that those who carefully comply with it are more easily induced to keep all the other Commandments. For among the other works which are necessary on holydays, the faithful are bound to assemble in the church to hear the Word of God. When they have thus learned the divine justifications, they will be disposed to observe, with their whole heart, the law of the Lord. Hence the sanctification and observance of the Sabbath is very often commanded in Scripture, as may be seen in Exodus, Leviticus, Deuteronomy, and in the prophecies of Isaias, Jeremias," and Ezechiel, all of which contain this precept on the observance of the Sabbath.