67 and authority. He proclaims his ideas without the restraint which is imposed upon most persons by doubt, modesty, and diffidence,1 further there15, one may suppose, a real clarification. In any case, the mass of mankind is always ready to be swayed by anything thus authoritative and distinct. History is full of stories of officers who have walked unarmed up to a mutinous regiment, and disarmed them by the mere force of confidence. The power of the orator over the mob is well known. It is, probably, for this reason while that the prophet has been able to constrain mankind to obey his law. It never occurs to him that any one can do otherwise. In practical life one can walk past any guardian, such as a sentry or ticket-collector, if one can really act so that the man is somehow persuaded that you have a right to pass unchallenged. This power, by the way, is what has been described by magicians as the power of invisibility. Somebody or other has an excellent story of four quite reliable men who were on the look-out for a murderer, and had instructions to let no one pass, and who all swore subsequently in presence of the dead body that no one had passed. None of them had seen the postman. The thieves who stole the “ Gioconda ” from the Louvre were ] This lack of restraint is not to be confused with that observed in intoxication and madness. Yet there is a very striking similarity, though only a superficial one