Lucian Abdicatus 30

[30] To be sure, of madness itself there are countless varieties, with many causes and even dissimilar names; for perversity, eccentricity, delirium, and lunacy are not the same thing, but are all names that signify whether one is more or less in the grip of the disease. The causes, too, are of one sort with men, another with women, and even among men they are of one sort with the young and different with the aged; for instance, with the young usually excess of humours, whereas in the case of the old, groundless prejudice and insensate anger against members of the family, attacking them frequently, disturbs them at first, then gradually deranges them to the point of insanity. Women are affected by many things which easily incline them to this ailment, especially by excessive hatred of someone, or jealousy of an enemy who is prospering, or grief of some sort, or anger; these passions, slowly smouldering and acquiring strength in a long lapse of time, produce madness.

[30] It must be remembered too that madness itself has a thousand forms, numberless causes, and even some distinct names. Delusion, infatuation, frenzy, lunacy—these are not the same; they all express different degrees of the affection. Again, the causes are not only different in men and women, but, in men, they are different for the old and for the young; for instance, in young men some redundant humour is the usual cause; whereas with the old a shrewdly timed slander, or very likely a fancied domestic slight, will get hold of them, first cloud their understanding, and finally drive them distracted. As for women, all sorts of things effect a lodgement and make easy prey of them, especially bitter dislike, envy of a prosperous rival, pain or anger. These feelings smoulder on, gaining strength with time, till at last they burst out in madness.