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It is important that those who listen are touched in their soul in the way that the speaker would like them to be touched; this can never be achieved if the speaker does not know in what ways, with what means, and with what type of speech they can influence human souls in this or that direction. And these things lie deep in the hidden and secret philosophy of the heart…
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No one can ignite the hearts of the listeners with speech or diminish the fervor of those already inflamed, except for the one who has understood the essence of the nature of all things, the human character, and the principles of thinking, which means that the speaker must necessarily study philosophy.
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Therefore, we consider it his duty to speak about what things are good or bad, what should be desired or avoided, what is honorable and what is shameful. Useful or useless, then about virtue, justice, self-control, prudence, greatness of spirit, nobility, loyalty, friendship, duty, reliability, and other virtues and their opposing vices, and also about the state, government, military skill, state organization, human nature…
An excellent speaker, who is also a good person, brings honor to the entire state.
On everything that can be a subject of discussion among people, someone who proclaims themselves as a speaker must speak well or renounce the title of a speaker.
Who can more passionately encourage virtue than a speaker, who can more sharply deflect from wrongdoing, who can more vigorously reproach evildoers, who can more beautifully praise the good? Whose attack can more powerfully break greed, whose comfort can more gently calm pain? And whose voice, besides that of a speaker, could entrust immortality to history, which is the witness of time, the light of truth, the living memory, the teacher of life, the messenger of the past?
For the art of speaking eloquence is one of the greatest virtues; and although all virtues are equal and equivalent to each other, one is still more beautiful and brilliant in its external appearance than the other, as is the case with this ability…
And the greater this ability is, the more it needs to be tied to goodness and supreme wisdom. If we were to make the wealth of oratory available to people who do not possess these virtues, we would not make them speakers, but, in a way, we would hand weapons to madmen. The ancient Greeks called this method of thinking and expressing thoughts and the ability to speak wisdom.
The true scope of oratory is such that it encompasses the origin, action, and changes of all things, virtues, duties, and the entire nature on which human character, spirit, and life are based, that it determines customs, laws, and rights, that it governs the state, and that it expresses itself embellished and rich on any topic it relates to.
But just as nature has organized most things, so it is with speech, that What carries the greatest benefit also has the greatest amount of dignity and attractiveness.