Catholics believe that every time they gather to celebrate, they are acting in obedience to Jesus' command to do this in memory of me. Catholics have obeyed this command for nearly 2,000 years, and now you can explore anew the spiritual and theological meaning of this vital celebration. Your guide is Fr. John Baldovin, SJ, PhD, a celebrated professor of liturgical theology at Boston College and past president of the North American Academy of Liturgy...