yes Karim that's right the smile is a powerfull and meaningfull action but infortunatelly when you go to public places sometimes such as Library just because of their frown faces they spread hate in your heart so you just go and get the heck at of that place but Karim I didn't ask you why do you smile like you said to cheer up the others I said when do you smile ?? but thank you for comment great saying and you too shin thank you