Your mistakes don't limit you. Your FEARS limit you. There are two types of fear: instinctive and intellectual. Instinctive fear is what moves you out of the way when a truck is barreling down on you. This type of fear is productive, and you WANT IT to be operable. When your ancestors were on the Serengeti, instinctive fear kept them from getting eaten by a saber tooth tiger. There aren't many saber-tooth tigers in your world today. There are crazy cab drivers in Manhattan to dodge, but not too many tigers...