Growing up in the Episcopal Church, I never thought too hard about how priests learned how to do what they do. I guess I knew that they went to a special school to get specific training (seminary), but I didn't give too much thought to how they figured out how to do all the things that go into a regular worship service. In fact, I remember specifically thinking it was weird that the priest had to look at a book during the Eucharist in order to know what prayers to say--I mean, they do it every week! Can't they memorize it?
Turns out the whole thing is a little more complicated than I realized, and the big picture of seminary focuses a lot more on theology, pastoral skills and parish leadership than it does on what to do with your hands on Sunday morning.
At my seminary, one of the very last classes that we take before graduation is called "Liturgical Leadership" (we call it "Magic Hands"). In it, we learn how to do the basics of the liturgy, essentially becoming adept at thinking liturgically. There is actually a lot of stuff to know--so much stuff, in fact, that memorization is pretty much out of the question.
In "Magic Hands," each student is assigned to a particular liturgy. We truncate the service to make it fit into an hour, and then the whole class participates in it together. A few weeks ago I dressed up as the assistant priest in an Easter Vigil liturgy (no one in the class is actually a priest, so we are really just putting on the clothes and doing our best). As I've mentioned before, the Vigil is one of the most important liturgies in the Christian calendar, and also the longest. I was amazed that we were able to it in only an hour. We even had time to baptize some one!
It felt really strange to put on a priest's stole and lead a congregation through an entire service, and the whole thing managed to feel really prayerful even though we were all basically play acting. Sometimes I wonder if people think that this is all that we do in seminary. Like for three years we try on different fancy outfits and learn how to physically perform sacraments. Of course, it's not like that at all, but the image does have a certain "Harry Potter-esque" feel to it. And like I've said before, seminary is a spitting image of Hogwart's School for Witchcraft and Wizardry.