Hi everyone! This seems like a neat place, might at least save the people I know some blank nodding.
The claim I want to make here is that heart swords in Revolutionary Girl Utena and gods in Hitherby Dragons are more or less the same metaphor.
Content warning for child abuse, since that's a significant theme of both works, not to mention spoilers for both of course.
Let's start with Utena. It's sometimes said that swords in Utena represent relationships, but I'm not convinced* - for instance, it's difficult to see under that reading what would be so special about Utena using her own heart sword rather than Anthy's later in the series. As I see it, the key to understanding the heart swords is from episode 15 (The World Framed By Kozue, the first black rose duel with a student council member). Near the beginning, we have the following exchange between Mikage and (Anthy-)Mamiya (my emphasis):
Mamiya: The council members. Swords strong enough to defeat Utena Tenjou may have crystallised inside their hearts! That is what my black rose tells me.
Mikage: But they have already lost their duels. The weak-hearted fools.
Mamiya: There are few who are able to freely use their own hearts. This is especially true of young people.
Which is to say, as I understand it, that heart swords represent something like motivation, reason to care or the set of things someone cares about. It's difficult to purposefully direct your own heart, but someone with a "hold over your heart" can do it for you - whether you want it or not.
So why is it that the student council in particular have these swords? In the context of Utena, it's because they're duelists - people who aim to revolutionise the world because they can't accept the way it is. Why it is that the experiences that create a duelist that make their 'ways of caring' interesting will hopefully become clear.
Conveniently**, Jenna Moran has written a few times fairly clearly in Hitherby letters columns about gods. In particular (my emphasis):
while the creation of gods is parallel to the development of a personality, it’s also parallel to the development of an ideological or moral stance, or a decision, or a belief. It’s the assumption of a new stance, because your old model of existence or action failed you.
The gods created through the agency of the monster serve a functional purpose similar to Dissociative Identity Disorder. But this isn’t what gods are. It’s simply one function that they can serve. [...] People who can create gods do seem to create them in the same circumstances where other people might create additional personalities. They also create them in other circumstances.
I read things like that as saying that when someone's model of the world becomes totally untenable and collapses, they create a new one. In the hitherbyverse, the new model/approach/whatever is embodied as a god, which is why the Monster tortures children*** - he breaks survival strategies, and worldviews that say 'the world is basically safe (as long as...)', to benefit from the gods created to replace them.
So, to spell out the connection:
A heart sword/god represents an approach to or understanding of reality, with respect to what matters.
They're created when a traumatic experience forces someone to abandon an older one (although in Utena characters often cling to their previous understanding). They may be created in other circumstances as well, but that's the route that both stories focus on.
Abusers deliberately drive the process to take the results for their own benefit. It's unclear to me whether this has a real-world parallel, since approaches to reality don't in real life tend to manifest physically as theological weaponry or even sharp metal sticks.
Nonetheless, it can be healthy under the right circumstances (maybe debatable in Utena)
Hopefully that makes some sense (at least to people familiar with both stories)!
* though it could be both, multivalent symbolism and all that
** for me at least, since with no firsthand experience I'd never unpick the metaphor on my own
*** apart from just enjoying it
what show/book is this from? it seems really interesting and id love to see more about it