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• Porphyry: On the Life of Plotinus and the Arrangement of His Work
• The First Ennead
• First Tractate the Animate and the Man
• Second Tractate On Virtue
• Third Tractate On Dialectic (the Upward Way)
• Fourth Tractate On True Happiness
• Fifth Tractate Happiness and Extension of Time
• Sixth Tractate Beauty
• Seventh Tractate On the Primal Good and Secondary Forms of Good (otherwise, On Happiness)
• Eighth Tractate On the Nature and Source of Evil
• Ninth Tractate “ the Reasoned Dismissal ”
• Bibliography and Explanatory Matter
• Notes
• I.: The Text
• II.: Previous Translations
• III.: Method of the Present Translation
• IV.: Commentaries
• In English
• French and German
• V.: Terminology
• The Divine Names
• 1.: The One
• 2.: The Intellectual-principle
• 3.: The All-soul
• The Divine-triad As a Unity
• The Gods and Daimones
• Man: His Nature, Powers and Destiny
• Matter
• Evil
• Morality
• The Term and the Way
• Minor Points of Terminology
• The Preller-ritter Extracts Forming a Conspectus of the Plotinian System
• I: The Fall of the Souls: Their Return
• II: The Grandeur of the Soul (human and Divine)
• III: The Soul In Relation to Its Prior, to the Intellectual-principle
• IV: The Intellectual Principle and the Intellectual-realm In Relation to the One
• V: The Beginning of Multiplicity
• VI: The Absolute Transcendence of the One
• VII: Why the Supreme Is a Triad
• VIII: The Soul and the World of Nature
• IX: Matter
• X: Soul and Body
• XI: The Soul In Man
• XII: The Soul After Death
• XIII: Likeness to God
• XIV: The Vision of the Supreme

In English

The Neo-Platonists: a study in the history of Hellenism: by Thomas Whittaker (Cambridge University Press: 1901): as a formal scientific exposition of the entire history of the school and a chart of the Plotinian system (some sixty pages summing the Enneads) this book is of the first value.

Much useful suggestion is contained in “The Wisdom of Plotinus: a Metaphysical Study” by Charles J. Whitby, London (William Rider and Son: 1909).

There is nothing more helpful, in its own wide sphere, towards the understanding and appreciation of Plotinus than the late Principal Caird’s beautiful work “The Evolution of Theology in the Greek Philosophers: Gifford Lectures for 1901-2” (Glasgow: MacLehose: 1904): this book, written in the loftiest spirit, contains some exquisite fragments from the Enneads: the author presumably disdained the humble work of a mere translator, but had he given us a complete rendering the world would have been the richer by a classic of thought and a classic of language.

In “Neo-Platonism” by C. Bigg, D.D. (London: Society for Promoting Christian Knowledge: 1895), we have a good general summary, rather popular in tone, of the system and of its antecedents and results.

Another work which would serve as an adequate explanation of practically the whole system is “The Problem of Evil in Plotinus”: B. A. G. Fuller: 1912: it includes translations of many cardinal passages and is written throughout in as lucid a style as has ever expounded a metaphysical system.

“The Philosophy of Plotinus,” by David Sylvan Guthrie (Philadelphia, Dunlop Printing Co., 1896): is a brief summary containing a helpful index to the most fundamentally significant passages of the Enneads.

The valuable works of Miss Underhill, dealing with the history and methods of the schools and masters of mysticism, are too well known to need more than the naming.

The translator owes acknowledgment to G. R. S. Meade, whose great labour on the Hermes’ documents gave him much valuable suggestion.

Edward Carpenter’s work “The Art of Creation” (George Allen: 1907) will be found very helpful as exhibiting, in modern terms and with the support of modern metaphysical and scientific investigation, a great deal that is either basic or implied in the Plotinian system.