Treatment for Depression
Our minds profoundly influence our bodies. If you are suffering from a lack of confidence, or from depression or anxiety then you are aware of how many negative thoughts your mind can generate.
I am sure you are also aware that "intellectual beliefs" do very little, if anything, to solve negative states of mind such as depression. By telling yourself rationally that you should feel happy everyday is unlikely to make you feel happier, but rather end up making you feel worse and feeling like you have failed.
Hypnosis works because it works by creating emotional beliefs on a unconscious level. These beliefs become deeply held and stay with you, and continue to stay with you, working with you every day.