From “The Tao of Jeet Kune Do” by Bruce Lee
The tools, your natural weapons, have a double purpose:
1. To destroy the opponent in front of you- annhiliation of things that stand in the way of peace, justice and humanity.
2. To destroy your own impulses caused by instincts of self-preservation. To destroy anything bothering your mind. Not to hurt anyone, but to overcome your own greed, anger and folly. Jeet Kune Do is directed toward oneself.