Proclus
412 to 485

Who was Proclus, and what is truly known of them?
What is known
Philosopher born at Constantinople to a family from Lycia. He studied at Alexandria, came to Athens about 430 and from about 437 until his death led the Platonic school there. He wrote long commentaries on Plato, a Platonic Theology, and the Elements of Theology, 211 propositions set out in the manner of geometry that derive all things from the One by abiding, going forth and return. His commentary on the first book of Euclid is a chief source for the early history of geometry, and seven of his hymns survive. His pupil Marinus says he kept the fasts and feasts of many peoples and spent a year in exile in Lydia. His thought reached the Middle Ages through the writings under the name of Dionysius the Areopagite and through the Book of Causes, an Arabic digest long taken for Aristotle’s.
The teaching
Taught from his own books, above all the Elements of Theology, the Platonic Theology and his hymns.
Every many shares in one
The Elements of Theology begins as a book of geometry begins, with a first proposition: every many in some way shares in unity. A many with no unity at all would be made of parts each of which was itself endlessly many, which is impossible. So before every many there is the One, which is also the Good, for to be one and to be good are the same: each thing is held together and kept in being by the unity it shares, and loses its good as it loses its unity. From this first principle Proclus derives all the rest, proposition by proposition, each with its proof.
Remaining, going forth, returning
Every cause that produces remains in itself while it produces, giving without being lessened. What it produces is lower than it and yet like it, for causes make things like themselves. And every effect does three things at once: it remains in its cause, it goes forth from it, and it turns back to it. It remains by what it shares with the cause, goes forth by what makes it other, and turns back by its desire for the good from which it came.
So all reality moves in a circle. What goes forth from the One returns to it; the last of things is joined to the first through the middle, by likeness at every step, so that the order of the world is an unbroken chain, and every link of it is an image of what is above it and a pattern for what is below.
Gods, being, life and mind
Next below the One are the henads, the gods, each a unity beyond being, and through them every level is held in the One. Then come being, life and intellect, three in one: all things are in all, but in each after its own manner, so that in being, life and mind are present as being, in life as life, and in intellect as mind. Then comes soul, and every soul has as its first vehicle a body of light, lasting and never born. Here Proclus parts from Plotinus: when a particular soul comes down into birth, it comes down whole, with no part of it left above.
The chains that run from each god
From every god a chain runs down through all the levels of the world: angels, daimons and heroes, then souls, animals, plants and stones that belong to it. The sun has its chain. The cock greets its rising with a hymn, and before the cock, Proclus says, even the lion draws back, for the cock stands higher in the sun's order. The heliotrope turns with the sun and, if one could hear it, sings to its king; the lotus closes before sunrise and opens with the light; the sunstone shines with golden rays. The moon has its chain too, and the moonstone that changes with her. The priests of old, knowing these sympathies, gathered what belongs to a god and so made a place where its power could be present: that is the priestly art.
All things pray except the First
All things pray except the First. Each by its nature turns back to its cause, and that turning is a prayer: the heliotrope's moving with the sun is its prayer, and the soul's hymn is the same movement made knowingly. Proclus gives prayer five stages: knowledge of the divine orders to which one prays; becoming akin to them by purity and likeness; contact, touching the divine with the highest part of the soul; drawing near; and union, when the soul rests in the god as one.
Three powers join the soul to the gods, as the Chaldean Oracles teach: faith, truth and love. Love leads it to the divine beauty, truth fills it with the divine wisdom, and faith settles it in the Good, beyond knowing, in a silent rest.
Mathematics between thought and sense
Mathematics stands in the middle, above the things of sense, which are divided and changing, and below the forms, which are undivided and always the same. Its objects are the soul's own reasons, which it carries within; when it does geometry it projects them onto the imagination as onto a mirror and studies there the figures it has unfolded from itself. So learning geometry is the soul's waking to what it already holds, and its use is to lift the eye of the soul from the senses towards pure thought, as a road to theology.
Fate and providence
Fate is the order of nature that governs bodies, and the soul so far as it lives in the body; providence is the goodness of the gods, above fate, from which fate itself hangs. The soul that lives by its body falls under fate; the soul that lives by reason rises above it and lives under providence. Nothing, then, is ruled by blind necessity, since even the chain of fate is held from above.
The hymns
His hymns pray for what his philosophy teaches. He asks the Sun, king of the fire of mind, who holds the key to the spring of life, to cleanse him of every fault and lead him up into the light. He asks the Muses, who lift souls out of the depths by the holy books, to lead him up to the pure light. And in the hymn to all the gods he calls on those who hold the rudder of holy wisdom, who kindle in souls the fire that draws them upward and leads them, out of the dark cave, to the immortals. Each ends in the same request: that the soul be turned back, freed and brought home.
The silence beyond the One
The highest is reached by denial. The Platonic Theology takes from the One every name and every attribute, even that it is one, and then lets go of the denials too, for they also are words. What remains is silence, and Proclus asks that the One be honoured by silence, the last and best of hymns.
Orders and memberships
Head of the Platonic school at Athens, a private foundation with its own endowment. Marinus says he learned the rites of the Chaldean Oracles from Asclepigenia, in whose family they had been handed down. No other order is documented.
The legend
The wonders in the Life that Marinus wrote in 486: that he brought rain to Attica by turning a ritual wheel, made charms against earthquakes, healed a sick girl by prayer at the temple of Asclepius, and saw Hecate in shining visions. He is said to have dreamed that he carried the soul of the Pythagorean Nicomachus. It is a pupil’s portrait of a holy man.
Their works
- Elements of TheologyTreatise, 5th century
Two hundred and eleven propositions, set out with proofs in the manner of geometry, that derive all things from the One by abiding, going forth and return. It is the clearest summary of late Platonism. An Arabic digest of it, the Book of Causes, was read in the Latin schools as Aristotle’s until Aquinas saw where it came from.
Ask the Oracle about it - Platonic TheologyTreatise, 5th century
Six books drawing a whole order of gods out of the dialogues of Plato, from the One down through ranks of divine powers. It treats Plato as a scripture to be read in harmony with the Orphic poems and the Chaldean Oracles. Ficino took its name for his own great book.
Ask the Oracle about it - Commentary on the TimaeusCommentary, 5th century
A vast commentary on Plato’s account of how the world was made, which survives for the first part of the dialogue. It gathers six centuries of earlier readings and joins Platonic cosmology to the theology of the Chaldean Oracles. It was the fullest guide to the Timaeus for later Byzantine and Renaissance readers.
Ask the Oracle about it - Commentary on the First Book of EuclidCommentary, 5th century
His lectures on the first book of Euclid’s Elements, which open with a defence of mathematics as a bridge between the senses and pure thought. It includes a short history of Greek geometry before Euclid drawn from a lost work of Eudemus, and is the chief source for that history.
Ask the Oracle about it - HymnsPoem, 5th century
Seven hymns in Greek verse, to the Sun, to Aphrodite, to the Muses, to Hecate and Janus and others, asking the gods to lift the soul and grant it wisdom. Marinus says Proclus kept the feasts of many peoples, and the hymns show the worship that went with his philosophy.
Ask the Oracle about it - On the Hieratic ArtTreatise, 5th century
A short essay on the priestly art of the Greeks, explaining sacred rites by the sympathy that runs through all things: the sunflower turning to the sun, stones and herbs that belong to a god. Ficino put it into Latin, and it became a source for the natural magic of the Renaissance.
It survives only in part, and in a form that may have been shortened by a later copyist.
Ask the Oracle about it
How the house tells a life
This life is told from the record, with what is documented, what is legend and what was forged kept apart. A membership in an order is stated only where documents show it. A person’s chart explains none of their deeds.
The arts it feeds
Lives near it in time
Thinkers and teachers
Marcus AureliusNagarjunaPlotinusManiPorphyryHypatiaBodhidharmaAdi ShankaraPadmasambhavaAl-KindiAvicennaMilarepaThe whole tree

