3:30am and I can't sleep. My mind is wide awake and haunting me with regrets from the past and anxiety about the future. Maybe this is just the human condition. So, here's the benefit. When in Kung Fu class the past and future disappear because my focus and total attention must be on the drill, the kick, the punch which gives me a break from the crud. I love being in the moment. Kung Fu is my emotional self defense.…