We depend on our willpower to do everything . martial arts athletes should be gripped by an inner pugnacity ; boxers should punch as they would at an enemy . only at that moment will they be overwhelmingly powerful 任何都是靠我们自己的意志力，即使平常人练武也是像这样，应该里面有杀气，打拳的时候就认为是在打敌人，那个时候打才很有力量。
