Discipline.  It works for both mental and physical strength-building.  To consistently exercise, you need discipline.  To consistently fight the battles of low self-confidence, you need discipline.   It’s so easy to say “I’ll exercise tomorrow”, or to give up when you make a mistake and say to yourself “I’m no good.”  Kung fu martial arts helps one develop discipline by providing a consistent method of working out and working up.  Yes!  Working UP!   Every work out builds physical strength.  Every belt advancement builds self-confidence.   Work your way up the ladder to a higher level of mental and physical strength through kung fu!