Compassion. Dignity. Respect. Those are the three words that have been going through my mind since I witnessed a beautiful exchange at Trader Joe’s. The man in front of me in line was alone, in a wheelchair, clearly down on his luck, unkempt, and seemingly fragile. The checker, German, greeted this man cheerfully and respectfully. “Hello Mr. X, may I get your groceries for you today?” German knew his customer. The man beamed, and said that would be nice. I didn’t quite understand what was happening until German took his wallet out of his pocket and extracted a $20 bill,...