Which we're having a good chat about in the comment thread here.
I remain of the view that it's a bit of a made-up subject, but I'll write in more detail justifying that some time when I get the chance. In the meantime I would say:
- we're discussing the cure of souls which is, of course, my day job;
- Bishop Alan links to this, which seems useful and practical;
- St Simon understands the sacraments.