On the Life of the Wise Man made perfect by Instruction or, on the Unwritten Law, that is to say, on Abraham (151-155)

and any one may conjecture this from the common changes which take place in its essential organs; for when grief exists in the soul of man, the eyes are full of concern and melancholy; and on the other hand, when joy is in our heart the eyes smile and rejoice; and when fear gets the upper hand they are full of turbulent and disorderly confusion, and are subject to all kinds of irregular motions, and quiverings, and distortions.

Again, if anger occupies us, the sight becomes more fierce and bloodshot; and when we are considerating or deliberating, the eyes are tranquil and motionless, and almost as intent as the mind itself; just as at moments of the relaxation and indifference of the mind, the eyes also are relaxed and indifferent;

when a friend approaches the feeling of goodwill towards him is proclaimed by a calm and serene look; on the other hand, if we meet with an enemy, the eyes give an early indication of the displeasure of the soul; when our mind is inspired by boldness, our eyes bound forward and are ready to start from our heads; when we are oppressed

but it is not in this particular alone that the beauty of the eyes exceeds the rest of the outward senses, but also because the use of the other senses is interrupted during our waking moments; for we must not include in our statement the inactivity which results from sleep; for they are at rest whenever there is not some external object to put them in motion; but the energies of the eyes when they are open are continuous and uninterrupted, as the eyes are never satiated or wearied, but continue to operate in accordance with the connection which they have with the soul;

and the soul itself is everlastingly awake, and is in perpetual motion both night and day; but to the eyes, as being to a great degree partakers of the fleshly nature, a self sufficient gift was given, to be able to continue exercising their appropriate energies during one half of the entire period of life.