Why does Musashi talk about swords so much?

Question from a reader -

I'm reading The Book of Five Rings, and I have a question.

There's a lot of good stuff about acting decisively and immediately so that you can win while your opponent is hesitating, but I don't get why he emphasizes swords so much in particular.

Masters of the long sword are traditionally known as heihosha [strategists]. As for the other military arts, those who master the bow are called archers, those who master the spear are called spearmen, those who master the gun are called marksmen, and those who master the halberd are called halberdiers. But we do not call masters of the long sword "long swordsmen", nor do we speak of "short swordsmen". Bows, guns, spears and halberds are all tools of the warriors and each should be a way to master strategy.

Willpower Isn't Enough

Jason Shen graciously contributed a new guestpost to the site -- his have always been popular here. He's running an online class on "The Science of Willpower, Habits, And Behavior Change" in January. Here's Jason --

Christopher Nolan's Batman trilogy is one of my favorite films and the best comic book to film translation ever done. Nolan's take on Batman is gritty, heroic, fresh, and even somewhat plausible. One of my favorite scenes from the first film, Batman Begins, is when he is being trained by Ra's al Ghul on the art of ninjutsu. The key conversation I want to point out here: 

George St. Pierre pummeling your untrained face