Institutio Oratoria

it is scarcely possible either for natural gifts or for methodic art to enable the mind to grapple simultaneously with such manifold duties, and to be equal at one and the same time to the tasks of invention, arrangement, and style, together with what we are uttering at the moment, what we have got to say next and what we have to look to still further on, not to mention the fact that it

For our mental activities must range far ahead and pursue the ideas which are still in front, and in proportion as the speaker pays out what he has in hand, he must make advances to himself from his reserve funds, in order that, until we reach our conclusion, our mind's eye may urge its gaze forward, keeping time with our advance: otherwise we shall halt and stumble, and pour forth short and broken phrases, like persons who can only gasp out what they have to say.

There is, therefore, a certain mechanical knack, which the Greeks call ἄλογος τριβή, which enables the hand to go on scribbling, while the eye takes in whole lines at once as it reads, observes the intonations and the stops, and sees what is coming before the reader has articulated to himself what precedes. It is a similar knack which makes possible those miraculous tricks which we see jugglers and masters of sleight of hand perform upon the stage, in such a manner that the spectator can scarcely help believing that the objects which they throw into the air come to hand of their own accord, and run where they are bidden.