All of the martial arts in existence can be expressed through one theorem - the Um/Yang or Ying/Yang symbol.  We can use many different ways of explaining this simple yet universal symbol.  This symbol represents the root of martial arts.  In Jungyae Moosul, we do not simply learn techniques; but rather, we focus our energies on learning the root theories and principles behind the techniques.  Commonly, marital arts systems have devoted their time to learning just the countless techniques in martial arts.  However, how many techniques can one human being learn in a lifetime?  100?  1000?  10,000?  This is like lock-picking doors.  After time and practice, the task becomes easier and easier; but, it is impossible and ultimately inefficient to unlock the vastness of the martial arts in this manner.  But, what if you had a universal key that opened all the doors?  Although it would still take many lifetimes to open all the doors, having the key gives the student a richer understanding of the martial arts, true confidence, and the freedom to explore with patience and understanding.  This is the goal of true martial arts.