the meaning of a smile

When we start our day with a smile or when we meet with friends or other people we give a smile, it is really amazing our daily life. Because the smile is very meaningful to others as well as to ourselves too, because by giving a smile to others we also get the reward and we also are not in fear by others against us, because with our smile can make others think to us is that we are not arrogant people. Therefore let's reproduce a smile in every day that we pass so that we get when and the smile is also classified in worship or alms