Words of Dr. Haim Ginott:
I have come to the frightening conclusion.  I am the decisive element in the classroom.  It is my personal approach that creates the climate.  It is my daily mood that makes the weather.  As a teacher I possess tremendous power to make a child's life miserable or joyous.  I can be a tool of torture or an instrument of inspiration.  I can humiliate or humor, hurt or heal.  It is my response that decides whether a crisis will be escalated, and a child humanized or de-humanized.