For there are three things at least that at the same instant strike the ear, — the note, the time, and the word or syllable. By the note we judge of the harmony, by the time of the rhythm, and by the word of the matter or subject of the song. As these proceed forth altogether, it is requisite the sense should give them entrance at the same moment. But this is certain, where the sense is not able to separate every one of these and consider the effects of each apart, there it can never apprehend what is well or what is amiss in any. First therefore let us discourse concerning coherence. For it is necessary that coherence accompany the discerning faculty. For judgment of good or bad is not to be made from notes disjoined, broken time, and shattered words, but from coherence. For there is in practice a certain commixture of parts which commonly are not compounded. So much as to coherence.