Such is Aristotle's psychological and logical realism, contained in the De Anima and logical treatises.
Of these treatises are: De anima intellectiva (1 270); Quaestiones logicales; Quaestiones naturales; De aeternitate mundi; Quaestio utrum haec sit Vera; Homo est animal nullo homine existente; Impossibilia.
Finally, in the spirit of Plato's Phaedo and the dialogue Eudemus, the Protrepticus holds that the soul is bound to the sentient members of the body as prisoners in Etruria are bound face to face with corpses; whereas the later view of the De Anima is that the soul is the vital principle of the body and the body the necessary organ of the soul.
The great commentaries exist only for the Posterior Analytics, Physics, De Caelo, De Anima and Metaphysics.
The positive exposition of atomism has much that is attractive, but the hypothesis of the calor vitalis (vital heat), a species of anima mundi (world-soul) which is introduced as physical explanation of physical phenomena, does not seem to throw much light on the special problems which it is invoked to solve.
Apelleiacos (lost), De paradiso (lost), De fato (lost), De anima (the first book on Christian psychology), De carne Christi, De resurrectione carnis, and De spe fidelium (lost), were all written after Tertullian had recognized the prophetic claims of the Montanists, but before he had left the church.
He held this position for seven years (1826-1833), occupying his leisure time with the preparation of a critical edition of Aristotle's De anima (1833; 2nd ed.
Returning to theology, he attempted to connect it with philosophy in a treatise, Dilucidationes philosophicae, de deo, anima humana, mundo (Tubingen, 1725, 1746, 1768).
This was a natural result of acquaintance with Aristotle's De anima and the numerous Greek and Arabian commentaries upon it, and it is observable in most of the writers that have still to be mentioned.
At the same time his psychology, though maintaining his empiricism, contained some seeds of conceptual logic, and indirectly of formal logic. Intellectual development, which according to the logic of the Analytics consists of sense, memory, experience, induction and intellect, according to the psychology of the De Anima consists of sense, imagination and intellect, and one division of intellect is into conception of the undivided and combination of conceptions as one (De An.