Whatever skill you are undertaking to master, it requires self discipline, patience, persistence and determination. This is also the route to self mastery. You can use whatever you are doing as a means to develop yourself in all ways.
I have chosen the area of scratching because it speaks to my spirit and makes me happy. I have a passion for it.
What activities have you chosen through which to gain self mastery? It really can be anything you know.
Do it with all your heart!