Institutio Oratoria

But here again there are many intermediate gradations between the two extremes, and just as the face, although it consists of a limited number of features, yet possesses infinite variety of expression, so it is with the voice: for though it possesses but few varieties to which we can give a name, yet every human being possesses a distinctive voice of his own, which is as easily distinguished by the ear as are facial characteristics by the eye.

The good qualities of the voice, like everything else, are improved by training and impaired by neglect. But the training required by the orator is not the same as that which is practised by the singing-master, although the two methods have many points in common. In both cases physical robustness is essential to save the voice from dwindling to the feeble shrillness that characterises the voices of eunuchs, women and invalids, and the means for creating such robustness are to be found in walking, rubbing-down with oil, abstinence from sexual intercourse, an easy digestion, and, in a word, in the simple life.

Further, the throat must be sound, that is to say, soft and smooth; for if the throat be unsound, the voice is broken or dulled or becomes harsh or squeaky. For just as the sound produced in the pipe by the same volume of breath varies according as the stops are closed or open, or the instrument is clogged or cracked, so the voice is strangled if the throat be swollen, and muffled if it