Martial art is not merely the physical act of filling time and space with precision-like movements. Machines can do that, too. As he matures, a martial artist will realize that his kick or punch is really not so much a tool to conquer his opponent, but a tool to explode through his consciousness, his ego, and all mental obstacles. Indeed, the tools are ultimately a means for penetrating the depth of his being so that he will restore the equilibrium of his inner center of gravity. With this vital inward loosening flows his outward expression of his tools. Behind each physical movement of an accomplished martial artist is this wholeness of being, this all-inclusive attitude.

~ Bruce Lee