This forth of the six Enneads (ΕΝΝΕΑΔΕΣ) written by Plotinus (ΠΛΩΤΙΝΟΣ); arranged by Porphyry (ΠΟΡΦΥΡΙΟΣ) and translated by Kenneth Sylvan Guthrie contains the following nine books:
1. Of the Being of the Soul (0:00:00)
2. How the Soul Mediates Between Indivisible and Divisible Essence (0:02:59)
3. Are Not All Souls Parts or Emanations of a Single Soul? (0:18:57)
4. Questions About the Soul (2:27:04)
5. About the Process of Vision and Hearing (5:31:10)
6: Of Sensation and Memory (6:14:53)
7. Of the Immortality of the Soul (6:31:27)
8. Of the Descent of the Soul Into the Body (7:47:49)
9. Whether All Souls Form a Single One (8:24:55)
Painting: The Virgin Adoring the Host by Jean Auguste Dominique Ingres, 1852.