As children we are encouraged to believe in the infallibility doctors and teachers. We learn that the doctor always knows best. In the same way, across the ocean in Haiti, people are brought up to believe in the infallible power of the witch doctor. When the bone spins and points to the 'victim', the victim dies. Beliefs are powerful beyond measure.
Doctors hold enormous power.
I believe they can curse or cure someone with their words alone. If the mind can be led to act out negative suggestions, it stands to reason it can be led in the opposite direction. Richard Bandler believes that rather than just using one method, there are many ways to help people recover. I don't care what you do for a living if you communicate with other human beings you are going to be using hypnosis whether you know it or not. That's the way in which language works.