If you don't know yourself, you don't know your nature. If you don't know your nature, you don't know where to exist. By knowing your nature, knowing yourself, you know what to be and how to live. And that only comes from knowledge of self, knowing yourself.
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.
RZAI think one thing most of faiths have in common is they all realize that everything manifests from one [god]. That's whether you're dealing with science, religion, Bible, whatever. They all realize it all came from one, and then from one, you got many.
RZA