It's weird when you think about it: We ALL have it to some
  degree. I don't think anybody's immune. But the levels are
  different for everybody and the coping skills are different for
  everybody. Yet for something that seems to be all too human, we
  NEVER TALK ABOUT IT. Why is it so forbidden? But it is. Are we
  trained young to believe that "voice in the head = crazy
  therefore can't talk about it?" Thing is: That's thinking. We
  all have voices in our heads. Everybody. Voices in your head is
  thinking. It's normal. Not every thought is "us" yet it's also
  "us" as well. Sometimes it comes from a few words someone once
  said long ago, echoing in the brain. Sometimes it "feels like
  you". Sometimes it "feels like it came from somewhere else".
  Normal. Just different levels. It's only when they are troubling
  enough to keep you from being able to cope with life's crap that
  it's considered a mental illness. But SOMEWHERE along the line
  (I suspect movies or childhood rumors that never end generation
  to generation, around the world), we can't talk about these
  things. You see someone you hate: for a split second, you
  imagine something unthinkable. You push it away. Hopefully.
  Maybe you relish it. Still all in the realm of normal human
  stuff. I've done both. But we can't talk about it. _That's_ the
  maddening part to me. == I'd say that using myself as a measure
  for "normal" is kinda weird, but I have 'just enough' psychology
  learnin' to know it's verified scientifically tongue emoticon my
  own abnormalities also in the realm of normal but maybe I have a
  broad definition of normal smile emoticon