We have already shown that crowds are not to be influenced by reasoning, and can only comprehend rough-and-ready associations of ideas. The orators who know how to make an impression upon them always appeal in consequence to their sentiments and never to their reason. The laws of logic have no action on crowds.[16] 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. This necessity of ceaselessly varying one's language in accordance with the effect produced at the moment of speaking deprives from the outset a prepared and studied harangue of all efficaciousness. In such a speech the orator follows his own line of thought, not that of his hearers, and from this fact alone his influence is annihilated. [16] My first observations with regard to the art of impressing crowds and touching the slight assistance to be derived in this connection from the rules of logic date back to the seige of Paris, to the day when I saw conducted to the Louvre, where the Government was then sitting, Marshal V----, whom a furious crowd asserted they had surprised in the act of taking the plans of the fortifications to sell them to the Prussians. A member of the Government (G. P----), a very celebrated orator, came out to harangue the crowd, which was demanding the immediate execution of the prisoner. I had expected that the speaker would point out the absurdity of the accusation by remarking that the accused Marshal was positively one of those who had constructed the fortifications, the plan of which, moreover, was on sale at every booksellers. To my immense stupefaction--I was very young then--the speech was on quite different lines. "Justice shall be done," exclaimed the orator, advancing towards the prisoner, "and pitiless justice. Let the Government of the National Defence conclude your inquiry. In the meantime we will keep the prisoner in custody." At once calmed by this apparent concession, the crowd broke up, and a quarter of an hour later the Marshal was able to return home. He would infallibly have been torn in pieces had the speaker treated the infuriated crowd to the logical arguments that my extreme youth induced me to consider as very convincing.