During my second month of nursing school, our professor gave us a
 pop quiz.  I was a conscientious student and had breezed through the
 questions, until I read the last one:
  'What is the first name of the woman who cleans the school?'
  Surely this was some kind of joke.  I had seen the cleaning
  woman several times.  She was tall, dark-haired and in her 50s, but
 how  would I know her name?   I handed in my paper, leaving
  the last question blank.  Before class ended, one student asked if
 the  last question would count toward our quiz grade.  'Absolutely,' said
 the  professor.  'In your careers you will meet many people. All are
 significant.  They deserve your attention and care, even if all
  you do is smile and say hello'. I've never forgotten that lesson.  I
  also learned her name was Dorothy.