A couple of years I heard a phrase "a million dollar smile." I could not understand the force of its meaning. Later I learnt from a learned Professor that the phrase meant "a friendly smile which falls on its receivers as moon light falls on people and the value of which cannot be estimated in terms of money."  Truly speaking smile is a grace for a person. I can win friends for you and disarm your opponents.  It costs you nothing, but brings great gains to you.  So why should we not use it effortlessly in our day to day life, especially when we deal with others?  A smiling face is an asset to anyone.

When we speak of smiling faces we should be careful in distinguishing an innocent and harmless smiling face from the smiling face of a villain or a cheat.  A great writer once used the phrase "a smiling villain."  True, some persons put on a smile to deceive others.  We should be extra careful in guarding ourselves against such fellows.  You may have been seen that some salesmen use smile with the ulterior motive to influence the customers.  It is oftern seen that a Nurse gives a bitter pill with a smile on her face to a patient.  Thus she attracts patient to obey her gently.