consider reading the book by the masterless samurai: The Book of Five Rings, Myamoto Musashi

i first heard about this book from the man working on the ronin dojo package; i was quite impressed, whether he's a fed agent or not, it doesn't matter (CIA discovered bitcoin and its preceding technologies, whatever); i did get surprised how angry he got for being associated with samurai wallet;

anyway, after chatting with the developer, i magically found this book at an obscure little shop in the middle of San Francisco, on one of my trips (btw, i wud never live there, there are basically zombies roaming the streets!);

so this book is about waging war thru knowing urself - if u know urself, and the barrier to bettering urself (internal enemies), then u can defeat bad habits, as well as whole armies; he explains this in terms of sword-fighting; Great book, timeless!