On the Soul
Forthcoming The translation of this work is in preparation and will be published in the library.
Introduction
On the Soul is the first systematic work of psychology in the West. Aristotle defines the soul as the first actuality of a natural body that has life potentially, that is, the form of a living body, so that soul and body can no more be separated than the shape of a seal from the wax. He examines in turn the powers of nutrition, perception, imagination, desire and thought, sets out a systematic theory of the five senses, and introduces his famous and difficult doctrine of the active intellect. The book shaped medieval philosophy and still informs the philosophy of mind today.