1. Of the Ten Aristotelian Categories (0:00:00) 2. The Categories of Plotinos (2:17:46) 3. Plotinos's Own Sense-Categories (4:09:17) 4. The One Identical Essence is Everywhere Entirely Present (6:24:30) 5. The One Identical Essence is Everywhere Entirely Present (7:39:26) Translated by Kenneth Sylvan Guthrie. Photograph: A Study by Henry Peach Robinson, 1858. Digital image courtesy of the Getty's Open Content Program. Recording and cover design by Geoffrey Edwards are in the public domain.