I think confidence builds competence and it helps us to continue to improve and move from “I know how” to “I’ll try” to “I am doing it.” A lack of confidence can hold people back from reaching their full potential. Without confidence we won’t overcome discouragement, disappointment and challenges, and we likely won’t practice. And if things don't work out at first, confidence helps us try again and directly contributes to a more positive attitude and expectancy which are contagious and can help those around us grow too.