During my second year of nursing school our professor gave us a quiz.  I 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 a joke.  I had seen the cleaning woman several times, but how would I know her name?  I handed in my paper, leaving the last question blank.  Before the class ended, one student asked if the last question would count toward our grade.  "Absolutely," the professor said.  "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.
-Joann C. Jones

Treat everyone with politeness, even those who are rude to you - not because they are nice, but because you are.
-Author Unknown

How far you go in life depends on your being tender with the young, compassionate with the aged, sympathetic with the striving and tolerant of the weak and strong.  Because someday in your life you will have been all of these. 
-George Washington Carver