Book 1
5.4
There is only one excellence that can be isolated for consideration, namely euphony, the Greek term for our uocalitas: that is to say that, when we are confronted with making a choice between two exact synonyms, we must select that which sounds best.
5.5
In the first place barbarisms and solecisms must not be allowed to intrude their offensive presence. These blemishes are however pardoned at times, because we have become accustomed to them or because they have age or authority in their favour or are near akin to positive excellences, since it is often difficult to distinguish such blemishes from figures of speech.1 The teacher therefore, that such slippery customers may not elude detection, must seek to acquire a delicate discrimination; but of this I will speak later when I come to discuss figures of speech. cp. § 40.
5.6
For the present I will define barbarism as an offence occurring in connexion with single words. Some of my readers may object that such a topic is beneath the dignity of so ambitious a work. But who does not know that some barbarisms occur in writing, others in speaking? For although what is incorrect in writing will also be incorrect in speech, the converse is not necessarily true, inasmuch as mistakes in writing are caused by addition or omission, substitution or transposition, while mistakes in speaking are due to separation or combination of syllables, to aspiration or other errors of sound.
