There’s a sign in someone’s yard on the route my wife and I regularly walk. It’s painted blue and red and proclaims in bold white letters: JUST BE KIND. I like that sign. And even though I don’t know the people who live in that house and made that sign, I like them too. Because anyone who goes through the trouble of making and posting a sign that says JUST BE KIND is probably the kind of people I want to be around. Kindness is contagious, after all. When we experience kindness or see kindness demonstrated, we’re more likely to go and do likewise. Kindness makes the world a better…