Sir, please explain this a little further. I'm a bit confused by it. Are you asking if "such things" (ie, learning the native language attached to a martial art's origin) give a better sense of the calm mind, "thus giving harmony in case of combat"? What does this mean? How would the learning of the language give a better sense of the calm mind? It does not make much sense to me. You reference "Samurai and Zen, Buddhist Monks and Hostile Aggression". Can you explain this reference vis-a-vis the point you are making regarding the sentence above it? Thank you.
PS - Kindly, sir, what martial arts do you practice? Pardon the inquisitive intrusion.