XLI. That principle then has nothing to do with this matter. And with the help of this distinction we will remove other obstacles which seem to be in the way of this classification, if any people think that it is possible that at times the assumption may be omitted, and at other times the proposition, and if this idea has in it anything probable or necessary, it is quite inevitable that it must affect the hearer in some great degree. And if it were the only object in view, and if it made no difference in what manner that argument which had been projected was handled, it would be a great mistake to suppose that there is such a vast difference between the greatest orators and ordinary ones. But it will be exceedingly desirable to infuse variety into our speech, for in all cases sameness is the mother of satiety. That will be able to be managed if we not always enter upon our argumentation in a similar manner. For in the first place it is desirable to distinguish our orations as to their kinds, that is to say, at one time to employ induction, and at another ratiocination. In the next place, in the argumentation itself, it is best not always to begin with the proposition, nor in every case to employ all the five divisions, nor always to work up the different parts in the same manner, but it is permissible sometimes to begin with the assumption, sometimes with one or other of the proofs, sometimes with both, sometimes to employ one kind of summing up, and sometimes another. And in order that this variety may be seen, let us either write, or in any example whatever let us exercise this same principle with respect to those things which we endeavour to prove, that our task may be as easy as possible. And concerning the parts of the argumentation it seems to us that enough has been said. But we wish to have it understood that we hold the doctrine that argumentations are handled in philosophy in many other manners, and those too at times obscure ones, concerning which, however, there is still some definite system laid down. But still those methods appear to us to be inconsistent with the practice of an orator. But as to those things which we think belong to orators, we do not indeed undertake to say that we have attended to them more carefully than others have, but we do assert that we have written on them with more accuracy and diligence. At present let us go on in regular order to the other points, as we originally proposed.