I really have to congratulate you. It sounds like you have a great handle on how your brain works! Keep doing what you're doing.

Speaking for myself, when manic, I tend to go for the macrocosmic, when I should think micro. "Aha! I have the knight archetype!!! I need to find some great cause to hitch myself up to!!"

Whereas, what I really need to do is take that energy, use it to push past resistance, and take some steps to advocate for myself and for my kids.

I don't know if you do this or not. But I would like to point out that, by simply being here, honestly sharing your story, you ARE a messenger of change.

An apocalypse is a revealing. You are giving us all the privilege of being present of the revealing of your true self.

And I can see how very relevant the "Dune" story could be, although it will mean different things to each of us. There's a whole branch of psychotherapy known as "Bibliotherapy" that deals with that sort of thing.
.
Maybe think about WHY the story is so meaningful to you. It may not be obvious. Sometimes I've found it helpful to consult a dream dictionary, and treat the book or movie I'm fascinated with as a waking dream. For example, I have been "coincidentally" encountering Zombie invasion stories lately. In (some people's) dream dictionary terms, "Zombie invasion" can mean that you're feeling completely overwhelmed.

To help with this, I took a cue from one of the characters in the movie "Zombieland", and wrote up my own set of rules for surviving both the manic and depressed phases. Kind of like the action plan they make you write before they let you out of the hospital. Only funnier. (Psych Techs tend to frown on black humor in action plans.)

If that makes any sense.