The Supplement transmitted as the second book of On the Soul by Alexander of Aphrodisias (fl. c. 200 AD) is a collection of short texts on a wide range of topics from psychology, including the general hylomorphic account of soul and its faculties, and the theory of vision; questions in ethics (natural instincts, the unity of the virtues, the naturalness of justice and the insufficiency of virtue for happiness); and issues relating to responsibility, chance and fate. One of the texts in the collection, On Intellect, had a major influence on medieval Arabic and Western...