Hizen is a term given to someone with a natural tendency to positively impact
the world around them, they live skillfully, train hard and for the sole purpose of self improvement., They find
enlightenment in mastering skills that are deemed lethal or risky. In short you become a hizen when your dangerous skills are used to protect and better
the world and to also preserver peace for all.
Learning how to throw knives powerfully does not make you hizen. You become hizen when that skill is used to resolve conflict or to preserve piece.
I saw a thief
trying to hold up a store, there was a hizen inside who used
martial arts to disarm and knock the guy out.