For me, happiness is finding the same place, one that doesn't
   require much external activity to get to. For other, happiness
   requires feeding and is a process of addition.

   "Happiness + Sadness = 0. Need Happiness to get back to 1,
   because Sadness is - 1"

   But I don't think happiness works that way. Happiness has to be
   at the 0 point - well, not happiness but a sense of "ok"-ness.