There has been a lot of push back when asking women to "smile". I wonder the source and reasoning. I remind myself to smile at others, just so they feel better about the day. I have a lot of animosity toward many people that are doing certain things in the world right now, if I knew all of them maybe I wouldn't smile at them, but in general, I smile a lot. It is a small thing to do that reaps so many good things.
Never stop learning This is what I had learned about today Rhodium [en.wikipedia.org]
Why work hard and smile often?
I can only make a guess it's about responsibility, sacrifice and doing these things cheerfully.