We skip over three philosophers, Socrates, Plato, and Aristotle, to Plotinus (205-270 CE), who was the founder of Neo-Platonism. Neo-Platonism is based on Plato and Aristotle. Plotinus urged his Roman contemporaries to return to Plato’s teachings. He is regarded as the last great thinker of the Roman age.
Plotinus did not present his thought with a clear model. His system of thought may be deduced in a collection of six groups of nine treatises (The Enneads). We would like to show the basic logic structure of this system (essentially the Theory of Forms of Plato) and show its similarity to our model.
Plotinus considers the world as full of beings between the absolute One and the material world. The beings have soul, which is connected upwards through spirit or Intellect to the One and downwards with senses or nature to the material world.
Plotinus describes his model in very details; our discussion hope only to reveal its basic structure that can be understood with our model.