I also think that this can not be a healthy practice if you want to keep the smile and hide the pain. If you feel bad yourself, then it is important not to smile. One thinks oneself, one sees it, but it's not that way, no one can see through one. I think it's important to be honest with yourself. If we smile, even though we are not feeling well, then we are not honest with ourselves and then it can become a forced smile and people are certainly not happy, because you will notice that already. We can take our pain to life without hurting or being rude. And there are often enough reasons for not always feeling positive because what we experience is not always positive. I think you can not always show the other what's going on in us. But I also find that we come closer to our inner self when we speak with our inner self. And I think this is the place where we can meet the next person.