Institutio Oratoria

In comedy, on the other hand, over and above the methods adopted to distinguish between slaves, pimps, parasites, rustics, soldiers, harlots, maidservants, old men stern and mild, youths moral or luxurious, married women and girls, we have the important rôle of the father who, because at times he is excited and at others call, has one eyebrow raised and the other normal, the custom among actors being to turn that side of the face to the audience which best suits the role.

But of the various elements that go to form the expression, the eyes are the most important, since they, more than any-thing else, reveal the temper of the mind, and without actual movement will twinkle with merriment or be clouded with grief. And further, nature has given them tears to serve as interpreters of our feelings, tears that will break forth for sorrow or stream for very joy. But, when the eyes move, they become intent, indifferent, proud, fierce, mild, or angry; and they will assume all these characters according as the pleading may demand.