How powerful is hypnotism?

[Sanity Check]

 

 

Famous actor Danny Trejo says Charles Manson hypnotised him when they were both in prison.

 

Manson could hypnotise people and make them believe they were high on weed or heroin.

 

Could this be a good form of treatment in drug rehab centers?

 

Does hypnotism have a place in the dao.

 

For training purposes or therapy.