Marcus Tullius Cicero,
Cicero's Tusculan Disputations
“ The Greeks call all perturbation of mind by pretty nearly the same name; for they name every turbid motion of the soul πάθος, that is to say, a distemper. But we have given them a more proper name; for a disorder of the mind is very like a disease of the body. But lust does not resemble sickness; neither does immoderate joy, which is an elated and exulting pleasure of the mind. Fear, too, is not very like a distemper, though it is akin to grief of mind, but properly, as is also the case with sickness of the body, so too sickness of mind has no name separated from pain. ”
