If this is what I think it is, Scientific American had an amusing column about this.
It seems that according to this stupidity, if you get some disease like cancer, it's because you were thinking negative thoughts. If you're poor, it's because you're being pessimistic. Therefore, cancer and AIDS sufferrers brought it on themselves, as did the people in Africa's most impoverished nations. Serves them all right, I guess. If they'd just start thinking really happy thoughts, I guess Bangladesh could become a superpower overnight.