I love this quote, I try to remember this always. Smiling is such a small thing to do and uses less muscles ( hello wrinkles) than frowning. Just the physical act of smiling makes you feel happier when your sad and getting a smile from an unknown stranger can make someones day! I always remember the flip side of this when I feel like someone’s getting at me – don’t let them change your smile! They’ve probably got personal things going on.. they’re not mad at you.. they’re mad at the world!