Every aspect of the Eucharist matters. The Church provides clear guidance for the celebration of the sacred mysteries for the benefit of the ordained and the baptized to encounter these saving mysteries. Ars Celebrandi Serving the Mystery of Christ in the Eucharist infuses the contemporary preparations for the Eucharist with a new focus for a greater purpose. This book walks through each part of the Mass, discussing the directives for the celebration through the lens of the ars celebrandi , to help priests, deacons, and seminarians authentically join with Christ in his eternal Sacrifice with deeper faith, confidence, and reverence.