This is a lesson about the meaning and importance of the Ten Commandments. It explains how the Commandments are connected to the natural law, the Old Law, and the New Law, focusing particularly on the first Commandment, "You shall have no other gods before me." The lesson examines the virtues of faith, hope, and charity, as well as the virtue of religion, which is the special kind of justice that we owe to God. It also discusses various offenses against religion, such as idolatry, superstition, and sacrilege.