In this way, we influence the muscles of physiognomy [facial expression] and it is possible for us to arouse any passion or sentiment whatsoever; the… - James Braid

...have the power of directing or concentrating nervous energy, raising or depressing it in a remarkable degree, at will, locally or generally. That in this state, we have the power of exciting or depressing the force and frequency of the heart's action, and the state of circulation, or generally, in a surprising degree.

We must remember, during a period in history when 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 as the theoretical framework upon which science of hypnotism, “neuro-hypnology”, was built.

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.