I was in the London underground station at Heathrow Terminal 4. It was morning and there was a black lady cleaning the platform. She had such a proud look on her face; yet it was tinged with a sadness and resignation, which touched me. Looking around that same platform where she worked, I could see the people, in all sorts of dress - from tourists in shorts and flip flops, to businessmen in smart suits. They seemed totally oblivious to her and some had the audacity to look down their noses at her as she tried to sweep near them. She was doing her job. And she was doing it well. We all need to stop and think sometimes.