Institutio Oratoria

Such considerations arise both in deliberative and forensic oratory: in the latter they occur in relation to two questions, namely, whether some given person had the will, and whether lie had the power to do the deed; for hope will often create the will to act. Hence the well-known inference in Cicero: [*](pro Mil. x. 29. )

Clodius lay in wait for Milo, not Milo for Clodius, for Clodius had a retinue of sturdy slaves, while Milo was with a party of women; Clodius was mounted, Milo in a carriage, Clodius lightly clad, Milo hampered by a cloak.

With resources we may

To these we may add manner, the Greek τρόπος, in regard to which we ask how a thing was done. Manner is concerned sometimes with quality and the letter of the law [*](See § 40. Also III. vi. 55 and 66.) (we may for instance argue that it was unlawful to kill an adulterer by poison), sometimes with questions of fact, as for example if I argue that an act was committed with a good intent and therefore openly, or with a bad intent and therefore treacherously, by night, in a lonely place.

In all cases, however, in which we enquire into the nature and meaning of an act, and which can be considered by themselves apart from all considerations of persons and all else that gives rise to the actual cause, there are clearly three points to which we must give attention, namely Whether it is, What it is and Of what kind it is. But as there are certain

places

places

Arguments, then, may be drawn from definition, sometimes called finitio and sometimes finis. Definition is of two kinds. We may ask whether a particular quality is a virtue or make a definition precede and ask what is the nature of a virtue. Such a definition is either stated in general terms, such as Rhetoric is the science of speaking well, or in detail, such as Rhetoric is the science of correct conception, arrangement and utterance, coupled with a retentive memory and a dignified delivery.

we may define a word by giving its content as in the preceding instances, or by etymology: we may for instance explain assiduus [*]( Paulus (exc. Fest.) gives the following explanation of this absurd derivation, for which Cicero tells that Aelius Stilo was responsible: Some think that assiduus was originally the epithet applied to one who served in the army at his own expense, contributing an as ( i.e. instead of receiving it)! ) by deriving it from as and do, locuples [*](locheples ( wealthy ) is derived from locus = the posses sors of many places. ) by deriving it from copia locorum, pecuniosus [*](pecuniosus ( moneyed ) is derived from pecus = rich in herds. ) from copiapecorum. Genus, species, difference and property seem more especially to afford scope for definition, for we derive arguments from all of these.

Genus is of little use when we desire to prove a species, but of great value for its elimination. A tree is not necessarily a plane tree, but that which is not a tree is certainly not a plane tree; again, a virtue is not necessarily the virtue of justice, but that which is not a virtue is certainly not justice. We must proceed from the genus to the ultimate species; [*](cp. § 5. ) for example, to say that man is an animal will not suffice; for animal merely gives us the genus: nor yet will the addition of the words

subject to death

On the other hand species will give us clear proof of genus, but is of little service for its elimination. For example, justice is always a virtue, but that which is not justice may still be a virtue, such as fortitude, constancy or self-control. Genus therefore cannot be eliminated by species unless all the species included in the genus be eliminated, as for instance in the following sentence: That which is neither rational