 Personality types were similarly thought to be determined by the dominant humor in a particular person.Derived from the Ancient Greek "melas", "black", and "kholé", "bile", melancholia was described as a distinct disease with particular mental and physical symptoms by Hippocrates in his "Aphorisms", where he characterized all "fears and despondencies, if they last a long time" as being symptomatic of the ailment.Aretaeus of Cappadocia later noted that sufferers were "dull or stern; dejected or unreasonably torpid, without any manifest cause".