There will be many disappointments in our life. We have inevitably been hurt, betrayed. We are sad and lonely. The burden of work and even the pressure of survival , both large and small will be encountered from time to time. There would be accompanied by many of happiness and joy around us! With a positive attitude, happiness and joy to be limitless enlarged,smiling. Even if only slightly out of mouth smile, than mired in pessimism and loss of feeling to be much better...