Little concept. Big lesson. The other day I was walking with my son when one of our neighborhood’s more  “unfriendly” inhabitants ventured outside. (We all have at least one of those, don’t we?) I smiled, said hello and wished them a good evening. They scowled in return. I, on the other hand, smiled on. My youngest was quite baffled by this exchange and flat out asked me why I continued to be so nice that person when they clearly wanted none of it. “Because it matters,” I told him. “But WHY, mom? Why be nice to someone who doesn’t like…