Kitap 1
1.14
Let us now endeavor to treat of the method itself, to see how and by what means we shall be able to attain our objects. And so let us as it were start again, and having defined Rhetoric anew, pass on to the remainder of the subject.
2.1
Rhetoric then may be defined as the faculty of discovering the possible means of persuasion in reference to any subject whatever. This is the function of no other of the arts, each of which is able to instruct and persuade in its own special subject; thus, medicine deals with health and sickness, geometry with the properties of magnitudes, arithmetic with number, and similarly with all the other arts and sciences. But Rhetoric, so to say, appears to be able to discover the means of persuasion in reference to any given subject. That is why we say that as an art its rules are not applied to any particular definite class of things.
2.2
As for proofs, some are artificial, others inartificial. By the latter I understand all those which have not been furnished by ourselves but were already in existence, such as witnesses, tortures, contracts, and the like; by the former, all that can be constructed by system and by our own efforts. Thus we have only to make use of the latter, whereas we must invent the former.
2.3
Now the proofs furnished by the speech are of three kinds. The first depends upon the moral character of the speaker, the second upon putting the hearer into a certain frame of mind, the third upon the speech itself, in so far as it proves or seems to prove.
