^Apathy is veiled anger. Depression is anger turned inward. All
   anger is, at its core, a dark and cruel wish for harm to come
   upon the person who hurt you. Vengence is a common, boring way
   to resolve anger. Self-sabotage inflicts guilt on those around
   you - a strangely satisfying form of vengence based on anger
   turned inward. (my paraphrases)^