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

...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.

...by the term Hypnotism, or Nervous Sleep, I mean a peculiar condition of the nervous system, into which it may be thrown by artificial contrivance, and which differs, in several respects, from common sleep or the waking condition. I do not allege that this condition is induced through the transmission of a magnetic or occult influence from my body into that of my patients; nor do I profess, by my processes, to produce the higher [i.e., supernatural] phenomena of the Mesmerists. My pretensions are of a much more humble character, and are all consistent with generally admitted principles in physiological and psychological science. Hypnotism might therefore not inaptly be designated, Rational Mesmerism, in contra-distinction to the Transcendental Mesmerism of the Mesmerists.[ Braid, Observations on Trance or Human Hibernation, 1850, 'Preface.

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.