Catechism Paragraph 2192
Part 3:
LIFE IN CHRIST
Section 2: THE TEN COMMANDMENTS
Chapter 1: YOU SHALL LOVE THE LORD YOUR GOD WITH ALL YOUR HEART, AND WITH ALL YOUR SOUL, AND WITH ALL YOUR MIND
Section 2: THE TEN COMMANDMENTS
Chapter 1: YOU SHALL LOVE THE LORD YOUR GOD WITH ALL YOUR HEART, AND WITH ALL YOUR SOUL, AND WITH ALL YOUR MIND
"Sunday . . . is to be observed as the foremost holy day of obligation in the universal Church" (CIC, can. 1246 # 1). "On Sundays and other holy days of obligation the faithful are bound to participate in the Mass" (CIC, can. 1247).