Hi, Eagle Heart: A smile can do so much for another because that gives so much of one's spirit and goodwill as it is carried forward by another in the course of the day. A smile, or even wishing someone a good day, especially those who least expect to be wished because people see them as fixtures to services rather than as people (street sweeper, policeman, the bus driver to name a few) is so uplifting. I have been on the receiving end of smiles and wishes from complete strangers countless of times and I "pay forward" in the same manner the result of which, makes me feel that all be well come what may.