it is a very beautiful saying that without smile there is no symptom of happiness man can really feel and it as you said cures every disorder of lthe mind and also gives energy to life hence smile makes life longer and happier
I think smile is good for many diseases such as depression ,saddness in addation to the family problems .
Many studies said that the smile make the life longer i.e the person who is used to smile lives more the one who dont smile . others said the simle make the face more light and health .
so I dvise my friends to keep smiling if they want to live happily .
A Friendly Smile Everything's gone wrong today No one reacts to anything you say No matter how much you scream and cry, the world seems to be passing you by. No one seems to notice or care, that you are trying to be heard over your despair.
But on one face a smile shines through, a smile that knows and cares about you. A smile with love to lend, on a face you recognize as a friend.Author Unknown