Self-Mastery is about understanding our Self on all levels. It is about living every moment with absolute consciousness.

Being alive itself is sufficient, self-explanatory, and complete—the ultimate experience.
Self-mastery involves realizing this aliveness.

Carlos Castaneda

Self-Mastery is my Sadhana (Practice) every moment and my Sadhan (Tool) is my breath.

Self-mastery is our destiny

Abraham Maslow

Know thyself. Know everything else. Till there is nothing else but knowing