Some individuals may themselves be deceived by the compelling words of other individuals, but a much more significant number fall into the same state… - James Braid

...the position of the body significantly influences the emotions and sensations during the desired stage of hypnotism; also, whatever the passion which one wants to express by the attitude of the patient, when the muscles necessary to this expression are brought into play, the passion itself bursts forth suddenly and the whole organism responds accordingly. The upright body, the expanded chest, the contracted extensors, all that suggests the feeling of self-esteem, self-determination, resolve and unconquerable pride. As soon as one decreases the contraction of these muscles, that gives to the patient a depressed attitude, with a sunken chest, the expression of the features changes in a very manifest way, the voice and the whole manner of being of the individual now express humility, abasement and pity.

...during a period in history psychology was still a branch of academic philosophy. The psychological concepts developed by philosophers of mind, such as “dominant ideas” (akin to the automatic thoughts of Beck’s cognitive therapy) “habit and association” (a subjective precursor of Pavlovian conditioning), and “imitation and sympathy” (which we now call “role-modelling” and “empathy”), are repeatedly mentioned by Braid as the theoretical framework upon which his science of hypnotism, “neuro-hypnology”, was built. Braid’s friend and collaborator, Prof. William B. Carpenter, discusses the theoretical principles of this in his Principles of Mental Physiology (1889), especially in the chapter ‘Of Common Sense’ which concludes by quoting an approving letter from the philosopher John Stuart Mill sent to Carpenter in 1872. Mill agrees with Carpenter’s contention that “common sense”, by which he means a kind of intellectual intuition analogous to the ancient Greek concept of nous, is a combination of innate and acquired judgements, which have a “reflexive” or “automatic” quality and appear to consciousness as “self-evident” truths.

It is however possible, by education, to entirely invert the order of these natural phenomena: suppose that the operator [hypnotist] speaks, with each pass or with each movement that he executes, and that he says in advance what will happen, then what he said in advance can take place instead of what would have occurred naturally.