In our society filled with busy schedules, many treat Sunday like just another day. Catechists lament that their students do not attend Mass regularly. Many who do attend have no issue with “skipping” a few weeks. Yet, Sunday Mass is a weekly obligation and is based on the Third Commandment, i.e. divine law: “Remember the Sabbath day. Keep it holy” (Ex 20:8). All of the Commandments are serious matter, so to deliberately miss Sunday Mass without a just reason is a mortal sin. Church Law also obliges us to assist at Mass on certain Holy Days. However, there are reasons that excuse us from this obligation; e.g. illness, unsafe weather conditions, caring for the sick or infants. We are also to keep Sunday by refraining from work so that it can be a day of rest and prayer. Going to Mass merely to fulfill a Church law alone does not suffice. Tom Hoopes on the Aleteia website provides eight other motivations to go to Mass and sees them as a means of evangelization: