Smiles on those who love you or even the smile from a stranger can make even the worst day slightly better in my opinion. So that's why I am thankful for smiles. Especially when you are having a rough time or when you see someone you have not seen in a while (understanding a while is relative depending on the someone!).
I try to smile as often as I can...even when I do not feel like smiling and especially when smiling is the last thing on my mind. I think a smile can transform your day...maybe its yours or maybe it is someone else's...who knows....but a smile can put you on the path to "being the change you wish to see in the world."
What makes you smile?