I found a good blog article articulating why Sunday Mass, the Eucharistic Celebration is so important.  The article can be found at Canterbury Tales.  Also, I recently discussed with a group of catechists how important it is to share with students that Sunday Mass is not optional but it is a part of God’s will.  We can’t shy away from sharing with students that it is a sin when people choose not to go to Sunday Mass because their lives are so busy and full of activities and other obligations.  Of course if students can’t drive themselves to Mass it is not sinful for them, however it is important to help them understand the vital importance Sunday Mass is to the life of a Catholic.