True mastery, it turns out, is not found in accumulating each and every tool under the sun. True mastery is learning that there are really only a handful of tools, and it is the proper application with correct timing and setting that makes them so useful.

Mastery does not exist.

If you are fortunate enough to have a particular activity with which you find greatest joy and technical success, it is your responsibility as a growing human being to continue that study. Whatever your endeavor, if you can expand upon the knowledge in your strongest subject, that new found understanding of all things will trickle down to every other area of your life.

Mastery, to whatever degree your circumstance allows, is determined by a handful of choices repeated daily.

I would more appropriately define mastery as the technical ability possible within the constraints of your particular existence. It must be noted that this is a subjective definition, and that this degree of mastery would be individual to each of us.

Jiu Jitsu gives me an ideal to strive toward. Technical mastery lies on an infinite continuum and completion of this skill is impossible. Every time I train I have something that I can improve upon, and this will hold true for each and every training session that lies between me and my grave.