Granny Weatherwax had never heard of psychiatry and would have had no truck with it even if she had. There are some arts too black even for a witch. She practiced headology---practiced, in fact, until she was very good at it. And though there may be some superficial similarities between a psychiatrist and a headologist, there is a huge practical difference. A psychiatrist, dealing with a man who fears he is being followed by a huge and terrible monster, will endeavor to convince him that monsters don’t exist. Granny Weatherwax would simply give him a chair to stand on and a very heavy stick.
---from Maskerade by Terry Pratchett.