Smiles

This is true indeed. A simple smile might seem to be an insignificant gesture but it might result in a seemingly effective outcome. It might just a slightly upward curve expressing happiness but its cause to others may be more than a line stretching to a silver lining. Smile alone communicates how we feel. When we are at loss of words, this simple act can help us to drive our message, whether it is a smile of greeting, of being proud to one's accomplishment, or even of sympathy. In the same principle, receiving a warm smile can help us ease our tension, or stress, even for a couple of minutes.

Well yes. I have experienced it. I have tried it myself. Whenever i thank the liftman who operates the lift in my college, he gets happy and smiles at rest of the students. They inturn smile at others and the professors. It goes on like this. And its never harmful just to give one smile, if its going to make someones day better.