““To bring home conviction to crowds it is necessary first of all to thoroughly comprehend the sentiments by which they are animated, to pretend to share these sentiments, then to endeavour to modify them by calling up, by means of rudimentary associations, certain eminently suggestive notions, to be capable, if need be, of going back to the point of view from which a start was made, and, above all, to divine from instant to instant the sentiments to which one’s discourse is giving birth.””