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 contraction of the interconnected muscles, constituting "the anatomy of expression”, evokes in the brain of the hypnotised person certain impressions just as these, in the waking state, determine the whole facial expression. It is thus merely a reversal of the usual order [of causation] between the emotions and their physical expressions.