In a letter to the world’s bishops dated August 15, the Solemnity of the Assumption of Mary, and approved for publication by Pope Francis on Sept. 3, Robert Cardinal Sarah, who is the Prefect of the Congregation for Divine Worship and the Discipline of the Sacraments in the Vatican, invited the Catholic world to return to Mass. The sentence you have just read would have seemed ridiculous just nine months ago. The Sunday Mass “obligation” is a unique facet of Catholic culture

Saint Joseph was given the mission to protect, guide and provide for two people conceived without sin, Mary and Jesus, which means that...