There are two fundamentally different kinds of speakers: those who use reasoning, and those who speak from the heart. They reach two different sorts of people, those who understand through reason, and those who understand through the heart. Speakers who aim for the reason are generally found in parliaments, those who speak from the heart speak to the people.
The speaker who uses reason, if he is to be effective, must command a wide range of statistical and factual material. He must be a master of dialectic as the pianist is master of the keyboard. With ice cold logic, he develops his line of thinking and draws irrefutable conclusions. He is most effective with people who work primarily or exclusively with reason. Big and compelling successes are denied him. He does not understand how to fire up the masses for a great cause. He is limited to educational discourse. Since he is cold, he leaves his listeners cold. At best he persuades people, but never mobilizes them and sets them marching regardless of their own ideas or the element of personal risk involved.
The speaker from the heart is different. He may have the skills of the master of reasoning. They are, however, only tools he uses as a true rhetorical virtuoso. He has abilities not found in the reasoning speaker. He combines clear diction with simple argumentation, and instinct tells him what to say and how to say it. Language is united with ideas. He knows the secret corners and aspects of the mass soul and knows how to reach and touch them. His speeches are masterpieces of declamation. He outlines people and conditions; he inscribes his theses on the tablet of the age; with deep and noble passion he explains the pillars of his world view. His voice reaches out from the depths of his blood into the depths of the souls of his listeners. He brings to expression the secrets of the human soul. He rouses the tired and lazy, fires up the indifferent and the doubting, turns cowards into men and weaklings into heroes.
These rhetorical geniuses are the drummers of fate. They begin their work alone in dark and dismal historical epochs and suddenly and unexpectedly find themselves in the spotlight of new developments. They are the speakers that make history.
As any great man, a gifted speaker has his individual style. He can only speak as he is. His words are written into his body. He speaks his own language, whether in posters or letters, essays, addresses or speeches.