For all baptized Catholics, Sunday Mass is not optional, but an obligation. Sunday is the day on which Jesus Christ rose from the dead and is therefore worthy of weekly celebration. Since the earliest days of the Church, beginning with the Apostles, Christians gathered on the first day of the week to celebrate the Resurrection and the Eucharist. These gatherings very quickly became a solemn obligation of faith. The requirement is rooted in the third commandment to “keep holy the Sabbath” by remembering Christ’s Passion, Resurrection, and glory and giving God the thanks, praise, and worship he is due. While the obligation to attend Sunday Mass is serious, it should not be perceived as burdensome and legalistic. We ought to approach Mass with love for God and view it as a gift. We are privileged to freely accept God’s invitation to gather where Christ encounters the faithful, nourishes us with his body, and unites us in faith and charity.