Isocrates Antidosis 12

[12] But I urge all who intend to acquaint themselves with my speech, first, to make allowance, as they listen to it, for the fact that it is a mixed discourse, composed with an eye to all these subjects; next, to fix their attention even more on what is about to be said than on what has been said before; and, lastly, not to seek to run through the whole of it at the first sitting, but only so much of it as will not fatigue the audience. ¹ For if you comply with this advice, you will be better able to determine whether I speak in a manner worthy of my reputation.