Kung fu is more than a system of fighting. It’s a system of thought. You must outthink your opponent, whatever form he takes… because some of them will be more than just men. We all have inner demons to fight. We call these demons ‘fear’, and ‘hatred’, and ‘anger’. If you don’t conquer them, then a life of a hundred years… is a tragedy. If you do, a life of a single day can be a triumph.
Dragon: The Bruce Lee Story, Bruce Lee