Institutio Oratoria

Emotions however, as we learn from ancient authorities, fall into two classes; the one is called pathos by the Greeks and is rightly and correctly expressed in Latin by adfectus (emotion): the other is called ethos, a word for which in my opinion Latin has no equivalent: it is however rendered by mores (morals) and consequently the branch of philosophy known as ethics is styled moral philosophy by us.

But close consideration of the nature of the subject leads me to think that in this connexion it is not so much morals in general that is meant as certain peculiar aspects; for the term morals includes every attitude of the mind. The more cautious writers have preferred to give the sense of the term rather than to translate it into Latin. They therefore explain pathos

Some add that ethos is continuous, while pathos is momentary. While admitting that this is usually the ease, I still hold that there are some subjects which demand that the more violent emotion should be continuous. But, although the gentler emotions require less force and impetus, they call for no less art and experience than the more vehement, and are demanded in a greater number of cases, indeed in a certain sense they are required in all.

For as everything treated by the orator may be regarded from the ethical standpoint, we may apply the word ethos whenever he speaks of what is honourable and expedient or of what ought or ought not to be done. Some regard commendation and excuse as the peculiar spheres of ethos, but while I admit that they do fall within its sphere, I do not regard them as being alone in so doing.