But if in other pursuits also men would select all that was found most sensible from many sources, instead of devoting themselves to one fixed leader, they would err less on the side of arrogance; they would not persist so much in error, and they would make less enormous mistakes through ignorance. And if we had as deep an acquaintance with this art as he had with that of painting, perhaps this work of ours might appear as admirable in its kind as his picture did. For we have had an opportunity of selecting from a much more copious store of models than he had. He was able to make his selection from one city, and from that number of virgins only which existed at that time and place; but we have had opportunity of making our selection from all the men who have ever lived from the very first beginning of this science, being reduced to a system up to the present day, and taking whatever we thought worth while from all the stores which lay open before us.
And Aristotle, indeed, has collected together all the ancient writers on this art, from the first writer on the subject and inventor of it, Tisias, and has compiled with great perspicuity the precepts of each of them, mentioning them by name, after having sought them out with exceeding care; and he has disentangled them with great diligence and explained their difficulties; and he has so greatly excelled the original writers themselves in suavity and brevity of diction, that no one is acquainted with their precepts from their own writings, but all who wish to know what maxims they have laid down, come back to him as to a far more agreeable expounder of their meaning.
And he himself has set before us himself and those too who had lived before his time, in order that we might be acquainted with the method of others, and with his own. And those who have followed him, although they have expended a great deal of labour on the most profound and important portions of philosophy, as he himself also, whose example they were following, had done, have still left us many precepts on the subject of speaking. And other masters of this science have also come forward, taking their rise, as it were in other springs, who have also been of great assistance in eloquence, as far at least as artificial rules can do any good. For there lived at the same time as Aristotle, a great and illustrious rhetorician, named Isocrates, though we have not entirely discovered what his system was.
But we have found many lessons respecting their art from his pupils and from those who proceeded immediately afterwards from this school.
III. From these two different families, as it were, the one of which, while it was chiefly occupied with philosophy, still devoted some portion of its attention to the rhetorical science, and the other was wholly absorbed in the study and teaching of eloquence, but both kinds of study were united by their successors, who brought to the aid of their own pursuits those things which appeared to have been profitably said by either of them, and those and the others their predecessors are the men whom we and all our countrymen have proposed to ourselves as models, as far as we were able to make them so, and we have also contributed something from our own stores to the common stock.
But if the things which are set forth in these books deserved to be selected with such great eagerness and care as they were, then certainly, neither we ourselves nor others will repent of our industry. But if we appear either rashly to have passed over some doctrine of some one worth noticing, or to have adopted it without sufficient elegance, in that case when we are taught better by some one, we will easily and cheerfully change our opinion. For what is discreditable is, not the knowing little, but the persisting foolishly and long in what one does not understand, because the one thing is attributed to the common infirmity of man, but the other to the especial fault of the individual.
Wherefore we, without affirming anything positively, but making inquiry at the same time, will advance each position with some doubt, lest while we gain this trifling point of being supposed to have written this treatise with tolerable neatness, we should lose that which is of the greater importance, the credit, namely, of not adopting any idea rashly and arrogantly. But this we shall endeavour to gain both at present and during the whole course of our life with great care, as far as our abilities will enable us to do so. But at present, lest we should appear to be too prolix, we will speak of the other points which it seems desirable to insist on.
Therefore, while we were explaining the proper classification of this art, and its duties, and its object, and its subject matter, and its divisions, the first book contained an account of the different kinds of disputes, and inventions, and statements of cases, and decisions. After that, the parts of a speech were described, and all necessary precepts for all of them were laid down. So that we not only discussed other topics in that book with tolerable distinctness, we spoke at that same time in a more scattered manner of the topics of confirmation and reprehension; and at present we think it best to give certain topics for confirming and reprehending, suited to every class of causes. And because it has been explained with some diligence in the former book, in what manner argumentations ought to be handled, in this book it will be sufficient to set forth the arguments which have been discovered for each kind of subject simply, and without any embellishment, so that, in this book, the arguments themselves may be found, and in the former, the proper method of polishing them. So that the reader must refer the precepts which are now laid down, to the topics of confirmation and reprehension.
IV. Every discussion, whether demonstrative, or deliberative, or judicial, must be conversant with some kind or other of statement of the case which has been explained in the former book; sometimes with one, sometimes with several. And though this is the case, still as some things can be laid down in a general way respecting everything, there are also other rules and different methods separately laid down for each particular kind of discussion. For praise, or blame, or the statement of an opinion, or accusation, or denial, ought all to effect different ends. In judicial investigations the object of inquiry is, what is just, in demonstrative discussion the question is what is honourable, in deliberations, in our opinion, what we inquire is, what is honourable and at the same time expedient. For the other writers on this subject have thought it right to limit the consideration of expediency to speeches directed to persuasion or dissuasion.
Those kinds of discussions then whose objects and results are different, cannot be governed by the same precepts. Not that we are saying now that the same statement of the case is not admissible in all of them, but some kinds of speech arise from the object and kind of the discussion, if it refers to the demonstration of some kind of life, or to the delivery of some opinion. Wherefore now, in explaining controversies, we shall have to deal with causes and precepts of a judicial kind, from which many precepts also which concern similar disputes will be transferred to other kinds of causes without much difficulty. But hereafter we will speak separately of each kind.