Most martial art concepts, philosophies, theories, etc. are recognized by science; however, some have been given exotic names to make them sound special and some are far-out and based on nothing but anecdotal evidence and the uneducated beliefs of their creators and proponents.
"Do" or "the way": A way of life pursued by some martial artists.
Ki: The inner energy developed through training in the martial arts.
Meditation: Ways to slow your racing mind and dwell on inner thoughts.
Yin-Yang: The concept of opposites.
Osu: A vocal expression of ki.
Dokkodo: Precepts that express a stringent, self-disciplined, and ascetic view of life.
Seppuku: A traditional ritual of honor expressed by taking one's life.
Cheetah or gazelle: Hunter or prey; which are you?