The smile is a very important feature of the human face. But because of human intelligence, even that good part of human nature can be used in the wrong way, such as sarcastic smiles or diplomatic smiles, which only serve to create suspicion. I feel that a genuine affectionate smile largely depends on ones own attitude. It is illogical to expect smiles from others if one does not smile oneself. Therefore, one can see that many things depend on ones own behaviour. Dalai Lama