"The man who learns to believe learns also to kneel, and a faith or a liturgy no longer familiar with kneeling would be sick at the core." — Joseph Ratzinger, The Spirit of the Liturgy, Part III, ch. 2.
To serve at the altar is to do exactly this: to learn to believe with the body, to know in the muscle what the soul is being asked to assent to. Bowing, kneeling, processing, ringing the bell — these are not stage directions; they are a language. The course teaches the words, the grammar, and the meaning, so that what altar servers do is no longer rote but understood.
It is designed for adult and senior altar servers, for those who train and form them — masters of ceremonies, trainers, parish coordinators — and for any lay person who wishes to enter more deeply into the liturgical life of the Church.