Find your true self. The old question, asked in many ages, "Who am I?" Once you figure out who am I, and you know who am I, then you have that knowledge of self.
RZAKung fu was made so the monks could train their bodies and move their bodies with strength, so they could be physical enough to gain mental enlightenment. Before that, they kept falling asleep when [masters] were trying to teach them.
RZA