How was the universe created, and what is our place within it? These are the questions at the heart of Plotinus' Against the Gnostics. For the Gnostics, the universe came into being as a result of the soul's fall from intelligible reality-it is the evil outcome of a botched creation. Plotinus challenges this, and insists that the soul's creation of the world is the necessary consequence of its contemplation of the ideal forms. While the Gnostics claim to despise the visible universe, Plotinus argues that such contempt displays their ignorance of the higher realities of which the cosmos is a beautiful image.

The term dunamis (potentiality) entered into the philosophical vocabulary with Plato, but it was with Aristotle that it acquired, together with energeia (actuality), the strong technical meaning that the two terms have maintained, with variations, throughout subsequent philosophical tradition. The significance of the notions of actuality and potentiality in Plotinus' thought can hardly be overstated. Throughout the Enneads, they are crucial to understanding the specific causality of intelligible realities and the relation of participation between intelligible and sensible realms. In Ennead II.5, Plotinus for the first time provides a systematic clarification of his peculiar use of these terms, through a sustained revision of Aristotle's own elaboration of the topic and of his terminology. The treatise discusses the different meanings of potentiality and actuality as well as the way each of them applies or does not apply to the sensible realm, to the intelligible realm, and to matter.

This book represents the first ever systematic philosophical study of Marsilio Ficino’s Commentary on Plotinus’ ‘Enneads’ (first published in Florence, 1492), this work of Ficino being arguably as definitive for the Florentine thinker’s later work as the Platonic Theology was for his earlier. Publication of the present study uniquely illuminates the extent to which Plotinus had always been the crucial influence over Ficino’s revolutionary projects of introducing Platonic thought based on original Greek sources to western Europe, correcting certain features of late medieval and Renaissance Aristotelianism, and laying the foundations of a new Christian Platonism. The study can be read both as an independent introduction to Ficino’s later philosophy and as the complement to the first modern edition and translation of the Commentary on the 'Enneads' itself also by Stephen Gersh (I Tatti Renaissance Library, 2017-).

This early treatise is placed by Plotinus’ editor at the very end of the Enneads, as the culmination of his thought, matching Plotinus’ own last recorded instruction, “to bring the god in you back to the god in the all.” It is a cosmological sketch, arguing that the being of anything depends on its being unified by its orientation to its own good, and so also the being of Everything, the All. The One, or the Good, is at once the goal of all things both individually and collectively, and also the transcendent source of all that we experience, mediated through an intelligible order. But it is also, and perhaps more importantly, intended as a guide to the proper education and discipline of our own motives and experience. We are encouraged to put aside immediate sensory data, egoistic prejudice and sensual impulse, first to grasp at least a little of the intelligible order within which we all live, and at last to purge even those last intellectual attachments and experience what cannot be adequately described: the unity of being.

Aristotle and Plotinus set the horizon of inquiry--thinking is thinking on thinking. Discussion of mind, meaning, and subjectivity begins with the question, How is thinking on thinking different from the kind of thinking with which we are familiar? The answer is that 'thinking on thinking' is about the presuppositions, concepts, and problems that generate questions in ancient and modern metaphysics, epistemology, aesthetics, philosophy of mind, and philosophy of language. Topics examined include the nature of intentionality and meaning, identity and relation, mind and consciousness, self-identity and subjectivity--which lead into discussions concerning other minds, the limits of thought and language, and the emergence of aesthetics of the self. The effects of 'thinking on thinking' are mapped, particularly in parsing problems in ancient, modern analytic, and phenomenological thought, with advocacy of its importance in the present age.

Ennead IV.7 is a very early treatise (second according to Porphyry's chronological table), and unlike the many treatises devoted to attempts at untangling various issues Plotinus found problematic in Plato's thinking, this one presents the teachings of the other main schools current in Plotinus' day: the Stoics, Epicureans, Pythagoreans, and Peripatetics, all of whom presented soul as something material or as contingent upon material soul, and so as being neither truly immortal nor imperishable. It includes observations on many mainly Stoic doctrines on perception, memory, sensation, thought, virtue, powers of material bodies, mixture and reproduction (Chapters 1-83); on Pythagorean attunement (84); and on Peripatetic entelechy (85). In Chapters 9-10 Plotinus presents, in broad terms, Plato's doctrines on soul's immortality-mainly that of the individual soul, but a fortiori that of the soul of the cosmos. These chapters offer some of Plotinus' most powerful prose. He is not concerned to prove the soul's immortality-that was an uncontroversial tenet of Platonism, to be taken for granted. In this treatise Plotinus is laying down the indisputable foundations for his later writings.

What would a "reappeared" Plotinus answer today if asked how we might build a divinely-ordered city? That is the question at the core of this unique book, and Stephen Clark takes us on a wide-ranging deep dive to uncover possible answers. To do so, he first gives an account of the Plotinian philosophy of mind and metaphysics, showing how Plotinus nicely balances the entanglement of soul-body composites (our immediate identities) with the workings of the World Soul and the eternal soul that animates "from within." Drawing on later Christian and Islamic interpretations of the Neoplatonic tradition, and parallel developments in Hindu thought, he then describes the various social forms that seem to be the inevitable context of our lives here and now. Furthermore, we discover that the form a Plotinian religion adopts depends on taking seriously the thought of reincarnating souls and wandering hermits, but now with the difference in our time that, although some sages may be content to consider themselves simple wanderers in a world without borders or settled communities, some will follow the same path as Buddhists, Epicureans, and Christians: forming communities of friends loyal to their founder and to the fellowship of the Sangha. We learn as well that in due course even those among the hermits who prefer to go, almost literally, "alone to the Alone" will become part of dispersed, unhierarchical communities. Finally, Clark offers cautious thoughts about our likely futures, dependent both on current technological advances and on the realistic suspicion (shared by our predecessors) that catastrophes and wholly unexpected turns are always to be expected.

On Our Allotted Guardian Spirit is a lively and at times perplexing text combining general reflections on the nature of the soul with a discussion of the phenomenon of a personal guardian spirit. Plotinus wants to interpret Plato, and aims to integrate Plato's various statements about daimones into one comprehensive theory. This leads to some views that are, if not exotic, then at least strange on first encounter. However, a closer reading reveals that Plotinus is not interested in demonology per se. Instead, the central concern of the treatise are ideas about the soul, the self, and self-consciousness. Plotinus' explorations produce a theory of the mind as the agent and activity responsible for a person’s ethical choices and conduct of life. The demon emerges as a philosophical tool passed down from Plato, but adapted and rationalized to try to explain motivation to action, the impulse toward the ethical life, and even the various differences in human ethical and psychological constitution. This innovative theory is a response to a strong and ongoing current of thought in the philosophical tradition. The introduction offers an overview of ancient demonologies, starting with Homer and the Presocratics, and is followed by an in-depth examination of Plato, the Stoics, Plotinus, and later Neoplatonic developments. As such the book presents Plotinus’ specific rationalizing response to the idea of a guardian spirit in the context of ancient philosophical demonologies.

Ennead I.6 is probably the best known and most influential treatise of Plotinus, especially for Renaissance artists and thinkers. Although the title may suggest a work on aesthetics and thus of limited focus, this is far from the case. For it quickly becomes apparent that Plotinus' main interest is in transcendent beauty, which he identifies with the Good, the goal of all philosophical endeavor in the Platonist's search to assimilate himself with the divine. The treatise is at once a philosophical search for the nature of the divine and at the same time an encouragement to the individual to aspire to this goal by taking his start from the beauty which is experienced in this world; for it is an image of transcendent beauty. This upward movement of the treatise reflects throughout the speech of Socrates in Plato's Symposium in which he recounts the exhortation of the priestess Diotima to ascend from earthly to transcendent beauty, which for Plotinus is identified with the divine.

For Plotinus, the nature and status of the human soul is one of the central problems of philosophy. Ennead IV.3-4.29 constitutes his most penetrating enquiry into this topic, addressing the issues of the relation of the individual soul to the World Soul, the descent of the soul into body, its relations with that body, problems of personal identity and the nature of memory, sense perception, and the true seat of the emotions -many of which still have a resonance today. The treatise is an excellent example of Plotinus' distinctive method of enquiry: not dogmatic (though he is no sceptic), but worrying away at questions until he has uncovered their complexities to the best of his ability. Such a work requires detailed commentary, such as is provided here, to tease out fully the fascinating convolutions of his thought.