Why is listening to yourself important in practice?

Why is listening to yourself important in practice?
 
  a. The thoughts, feelings, and reactions you have when you work are important
  cues to help you understand what is happening when you practice, and can
  help to better understand how the client is perceived by others
  b. Your reactions to the client are important for the client to know in order to
  realize that they may need to change their interactional style with you in
  order to not upset or offend you
  c. It is not important in practice and should not be developed or used
  d. Being aware of how you feel and react to someone can help you realize when
  you are not the perfect fit for a specific client and need to refer them to
  someone else.