There is an overly simplistic adage that one should master one discipline before moving on to another. Well, it's not really much of a wise proverb outside of the often tribalistic and insular subculture of martial arts. Go to a regular school, and students are expected to not only study a wide range of subjects but often several similar subjects. Yet, when it comes to martial arts, there appears to be this pervading idea that you need to get to a certain level before you sho