I come from the "same world" where children's toys are destroyed in fire because of demonic mana enchanted within, Harry Potter, Pokemon and so on..
These ideas do so biiiig contrast between saved people by blood of Jesus (except lo behold! Devil has paradoxically very powerful ways to lead astray and make believers go disarray and make them sin and lose their redemption) and "the world" run by Devil that it becomes, excuse my pathologization: paranoid-schizoid. Soror Polyhymnia, you have had something similar to this in your mind? This was emphasized a lot but then it's never clear what is "world" and how to interact with it when it's corrupting according to this view?
So sucking the redemptive breast of God but then there is also another breast that brings anxiety and it is not very redemptive one (Using Melanie Klein's definition here)

https://melanie-klein-trust.org.uk/theo ... -position/The infant splits both his ego and his object and projects out separately his loving and hating feelings (life and death instincts) into separate parts of the mother (or breast), with the result that the maternal object is divided into a ‘bad’ breast (mother that is felt to be frustrating, persecutory and is hated) and a ‘good’ breast (mother that is loved and felt to be loving and gratifying). Both the ‘good’ and the ‘bad’ objects are then introjected and a cycle of re-projection and re-introjection ensues. Omnipotence and idealisation are important aspects of this activity; bad experiences are omnipotently denied whenever possible and good experiences are idealised and exaggerated as a protection against the fear of the persecuting breast.
I read extensively Samurai oriented literature before, but I never understood what Musashi meant in his writings.
Later I read (I wish I remembered where exactly) that these writings are coded - we might read about fighting stances and tigers and monkeys and elements but because we are not pupil's of school of Musashi it is really difficult to KNOW what is meant and what is the practice and tradition.
Therefore we are left with interpretation and creativity and one might use this very same book in teaching business and economics.
I'd assume that for Samurai, learning the art is an honor and it's way should be respected. Lots of dojos competed also, so you wouldn't just handout everything written in piece of paper. What master wants is devoted pupils who learn directly from him everything and these manuscripts or writings could be used as an aid to re-memorize and review what has been learned.
Anyway reading them with critical sense is advised.
I have also Shoninki with funny subtitle: "the secret teachings of the ninja".
Supposedly 17th century manuscript about espionage and concealment with some elements of folkloric magic but then there are the aspects that AGAIN I read somewhere stating, that some of the stuff written was for propagandist purposes: Either portraying spies as criminals or with good intentions. Some ideas seem very much like popular culture spy-thrillers but definitely there were spies and eavesdroppers too and whatever one might expect.
Ninjas also became some kind of James Bonds during some period of time in Japanese puppet theater, but I have to stop rambling here because this stuff comes just from back of my head although I wish I had sources to show.
Anyway I might have to look for Eiji Yoshikawa's book if it lays down some background on the theme as well!