everybody must know, or remember, that when Hitler and Mussolini spoke in public they were believed, applauded, admired, adored like gods. They were 'charismatic leaders'; they possessed a secret power of seduction that did not proceed from the credibility or soundness of the things they said but from the suggestive way in which they said them, from their eloquence, from their histrionic art, perhaps instinctive, perhaps patiently learned and practised ...

It is, therefore, necessary to be suspicious of those who seek to convince with means other than reason, and of charismatic leaders: we must be cautious about delegating to others our judgment and our will. Since it is difficult to distinguish true prophets fro false, it is as well to regard all prophets with suspicion.