All those men who are preeminent in philosophy or politics or poetry or the other arts are clearly melancholic.

Aristotle (384-322 BC) Greek philosopher

Problems [Problemata], Book 30, Q. 1 / 953a [tr. @sentantiq (2018)]
    (Source)

Possibly one of the sources of a famous misattributed Aristotle quotation by Seneca the Younger.

Alternate translation: "All those who have become eminent in philosophy or politics or poetry or the arts are clearly of an atrabilious temperament." [tr. Forster (1927)]