While reading a book, I found this ancient Chinese proverb "A man without a smiling face must not open a shop". And might as well share this to inspire everyone. Your smile is a messenger of your good will. Your smile brightens the lives of all who see it. To someone who has seen a dozen of people frown, scowl or turn their faces away, your smile is like the sun breaking through the clouds. Especially when that someone us under pressure from his bosses, his customers, his teachers or parents or children, a smile can help him realized that all is not hopeless, that there is joy in the world.