Greetings, To me, a master is similar to what some have said comparing it to a Master's Degree, but there is more to it than just education. The learning and perfection of a technique will make you very skilled at that technique, however, can it be delivered in the proper time and place? Can it be controlled to cause a specific amount of harm to an attacker that justifies the initial attack? What I am getting at is that one can learn and perfect a punch, but that does not mean they will have the ability to decide in a millisecond whether or not they need to simply stun an attacker or shatter their jaw. Mastery, to me, is having the knowledge, training, practice, and also the split second decisiveness to determine the correct course of action in any encounter. Nevermind, that I didn't even bring up the ability to split second decide if the punch is even necessary or can the encounter be absolved without the punch... My thoughts on this. Great topic, folks! I have met many people that claim mastery of their style or system.... some good, some excellent, some iffy. Cheers