I had never heard that before last night, and it was so simply
said and deep. And it describes many emotions but the best it
describes is: Envy. "Oh, look at her - she has it all. She has
good looks, a hardworking husband, beautiful kids, nice clothes,
nice house (OUTSIDE) and here I am unhappy, miserable, angry all
the time at everybody for everything (INSIDE)." and its so true:
You can't compare how you FEEL with the outside APPEARANCES of
another person. They're totally different. "