Book 9
2.2
But to proceed, figures of speech fall into two main classes. One is defined as the form of language, while the other is mainly to be sought in the arrangement of words. Both are equally applicable in oratory, but we may style the former rather more grammatical and the latter more rhetorical. These grammatical figures would not be styled figures of speech in English. Figures of language would perhaps be more comprehensive, but figures of speech is the translation and direct descendant of the original Greek σχήματα λέξεως and has therefore been used throughout. The former originates from the same sources as errors of language. For every figure of this kind would be an error, if it were accidental and not deliberate.
2.3
But as a rule such figures are defended by authority, age and usage, and not infrequently by some reason as well. Consequently, although they involve a divergence from direct and simple language, they are to be regarded as excellences, provided always that they have some praiseworthy precedent to follow. They have one special merit, that they relieve the tedium of everyday stereotyped speech and save us from commonplace language.
