must keep Sunday in the same way as the Jews were commanded to keep the Sabbath. The Council of Orléans in 538 reprobated this tendency, to apply the law of the Jewish Sabbath to the observance of the Christian Sunday, as Jewish and non-Christian. Church leaders of later centuries inscribed Sunday rest into official teachings, and Christian governments have attempted to enforce the Sunday rest throughout history. For Catholics, Jesus' teaching that "the sabbath was made for man, not man for the sabbath" means that good works "when the needs of others demand it" can be part of the day of rest. The Catechism offers guidelines on how to observe the Lord's Day, which include attending Mass on Sundays and holy days of obligation. On these days, Catholics may not work or do activities that "hinder the worship due to God", but "performance of the works of mercy, and appropriate relaxation in a spirit of joy" are permitted. According to the USCCB, this commandment "has been concretized for Catholics" as one of the Church precepts. The organization cites the papal encyclical Dies Domini: Because the faithful are obliged to attend Mass unless there is a grave impediment, pastors have the corresponding duty to offer everyone the real possibility of fulfilling the precept. ... Yet more than a precept, the observance should be seen as a need rising from the depths of Christian life. It is crucially important that all the faithful should be convinced that they cannot live their faith or share fully in the life of the Christian community unless they take part regularly in the Sunday Eucharistic assembly. Fourth commandment Pope Benedict XVI states that Rabbi Neusner "rightly sees this commandment as anchoring the heart of the social order". It strengthens generational relationships, makes explicit the connection between family order and societal stability, and reveals that the family is "both willed and protected by God." Because parents' unconditional love for their children mirrors God's love, and because they have a duty to pass the faith on to their children, the Catechism calls the family "a domestic church", "a privileged community" and the "original cell of social life". The Catechism says this commandment requires duties of children to parents that include: Respect toward parents that also flows to brothers and sisters. Gratitude, as expressed in a quote from Sirach: "Remember that through your parents you were born; what can