Well, after reading through the entire article (it took two sittings), I'm happily surprised and very much enjoyed and agreed with much of Greydanus' article. I think a lot of the conclusions that Greydanus reached at the end of his article were spot on, and I found the seven hedges to magic that he referenced quite interesting.
Since Greydanus was primarily concerned with the reader, not the writer, here are the conclusions I reached at the end of this article for myself as a writer, not a reader.
First, I really liked this quote:
S.D. Greydanus wrote:
"Of course, our freedom to reimagine the world, or to imagine other worlds, is not without limits: We cannot, for example, imagine a world in which love should be evil and hatred good; for the supremacy of love is not a mere contingent fact about the created world, but is an eternal and immutable fact about God himself. It’s one thing to rewrite the order of creation in fiction (since God could have chosen to create the world other than how it is), but quite another to rewrite the nature of the Creator himself (since God cannot be other than who and what he is)."
Given that, when creating worlds, and writing stories, when rewriting the order of creation in fiction, the danger comes in the effect that your book has on the reader. Writing magic in a book by itself might be fine (although I fall on the Tolkien side of things that fantasy & magical elements should be kept in worlds totally separate from our worlds), but what matters is how your book effects the reader, and, relating to the subject at hand, if it makes them want to try out magic in the real world.
This is where Greydanus' theory of the seven hedges comes into play. Insomuch as the hedges are not rules of "portray magic like this," but different ways to keep the magic in the book from being attractive to the readers, I thought that they all made sense as good suggestions. I would add an eighth hedge, though, that, though moreso with Tolkien, they are different with the distinguishing between what I'll call epic magic, rather than what I'll call dark magic or trivial magic.
For some defining of terms, "epic magic" is the type of magic which is found in works such as
Lord of the Rings,
The Inheritance Cycle, or
Star Wars, where the magic has a very other-ness sense and is primarily used for "epic" purposes. To further define what I mean, this is in opposition to "trivial magic," where the magic is used for light purposes and is so ingrained in the community that it is the source of pranks, small needs, or other small things. Although I haven't read the series, from what the articles said, Harry Potter has trivial magic in it, as well as the Septimus Heap series, which I've read. (Dark magic is the type of magic in this world with seances, ouija boards, etc.)
Having defined terms then, I think that trivial magic is more endearing than epic magic because epic magic has a sense of other-ness to it that I think trivial magic minimalizes, as well as making it seem more attractive to the reader.
So there are my thoughts. Practically, in my universe, I have hedges 1 and 2 and somewhat hedge 4. I think that Greydanus had some good points with hedge 7 as well. I think the take-away is not that all the hedges must be used or else, but that we need to realize that when writing with magic, we don't want our writing to make our readers more interested in real magic, and thus we want to find ways (hedges) to detract them from going down that path.