Institutio Oratoria

I would also have students of oratory consider that all the forms of argument which I have just set forth cannot be found in every case, and that when the subject on which we have to speak has been propounded, it is no use considering each separate type of argument and knocking at the door of each with a view to discovering whether they may chance to serve to prove our point, except while we are in the position of mere learners without any knowledge of actual practice.

Such a proceeding merely retards the process of speaking to an incalculable extent, if it is always necessary for us to try each single

For just as the melody of the voice is most pleasing when accompanied by the lyre, yet if the musician's hand be slow and, unless he first look at the strings and take their measure, hesitate as to which strings match the several notes of the voice, it would be better that he should content himself with the natural music of the voice unaccompanied by any instrument; even so our theory of speaking must be adapted and, like the lyre, attuned to such rules as these.

But it is only by constant practice that we can secure that, just as the hands of the musician, even though his eyes be turned elsewhere, produce bass, treble or intermediate notes by force of habit, so the thought of the orator should suffer no delay owing to the variety and number of possible arguments, but that the latter should present themselves uncalled and, just as letters and syllables require no thought on the part of a writer, so arguments should spontaneously follow the thought of the orator.