Johannes Scotus Eriugena

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Johannes Scotus Eriugena (c. 800 – c. 877) was an Irish scholar, translator, and philosopher who taught at the court of the Frankish king Charles the Bald, and the most original speculative thinker of the early medieval Latin West. His two names both mean the same thing — Scotus and Eriugena alike marking him as an Irishman, born in Ireland. Eriugena, the form he used to sign his Dionysius translation, he appears to have coined himself, modeling it on the Virgilian Graiugena (Greek-born) to render Ireland-born in learned Latin; the redundancy of the doubled epithet has survived because so little else about his life is fixed. Where he was trained, when he crossed to Francia, where and how he died: none of it is securely known. He surfaces from documentary obscurity already at the West-Frankish court by the mid-840s, directing the schola palatina, and the rest of his biography is inference from the work and embroidery from much later legend — the tale that his own students at Malmesbury stabbed him to death with their pens belongs to the twelfth-century chronicler William of Malmesbury and is treated as fable.

His first public commission was forensic rather than mystical. Around 850 the archbishop Hincmar of Reims set him against the Saxon monk Gottschalk of Orbais, who taught a rigorous double predestination — that God foreordains the damned to hell as surely as the elect to glory. Eriugena’s reply, the De divina praedestinatione (851), moved the dispute off Augustinian-juridical ground onto metaphysical ground: in a God of perfect unity there can be no foreknowledge of evil, because evil is a privation, a non-being, and what is not cannot be foreknown as something. The argument scandalized his Lyonnais critics, and two provincial councils — Valence (855) and Langres (859) — condemned it, the Valence fathers dismissing his reasoning as pultes Scotorum, Irish porridge. The censure did not cost him the king’s protection, and the habit of mind it displayed — dissolving a theological problem into a problem of being and non-being — would govern everything he wrote afterward.

The Greek translations

The decisive turn came around 860, when Charles the Bald asked him to produce a fresh Latin version of the writings circulating under the name of Dionysius the Areopagite — the Athenian convert of the Book of Acts whom the corpus claimed as author, and who is now placed anonymously around 500, a Greek writer who had fused Christian theology with the late Neoplatonism of Proclus (see Pseudo-Dionysius the Areopagite). A Greek manuscript of the corpus had reached the Franks as an imperial gift from Byzantium in 827 and been deposited at the abbey of Saint-Denis, where Abbot Hilduin had attempted a translation around 838; that version was, by the standard verdict, barely usable. Eriugena was almost alone in his era in reading Greek, and the commission gave the Latin world reliable access to a body of mystical thought it could not otherwise have touched. He completed his Versio Dionysii between 860 and 862 — the four treatises (The Divine Names, The Mystical Theology, The Celestial Hierarchy, The Ecclesiastical Hierarchy), the ten letters, two prefaces — and went on revising it for the rest of his life.

He did not stop there. He rendered into Latin the Ambigua and Questions to Thalassius of Maximus the Confessor, and Gregory of Nyssa’s treatise on the making of man. From these three Greek Fathers — Dionysius, Maximus, Gregory, with Augustine and Boethius as the Latin armature — he absorbed a single governing pattern: a metaphysics of procession and return, in which all things flow out from a transcendent source and are drawn back into it. This is emanation recast in a Christian and biblical key, the outflow read not as the leaking of a substance but as God’s free self-disclosure. The translation labor is the structurally decisive fact of Eriugena’s career: every later Latin reception of the Dionysian corpus — Hugh of Saint-Victor, Bonaventure, Thomas Aquinas, the Rhineland mystics, the Renaissance Platonists — runs in the first instance through his Latin. He is the gate through which the apophatic Neoplatonism of the Christian East passed into the West (the broad current itself is treated under Christian Neoplatonism).

The Periphyseon and the fourfold division

The thinking the translations seeded took shape in the Periphyseon, or On the Division of Nature (De divisione naturae), a vast dialogue between a master (the Nutritor) and his pupil (the Alumnus), composed in the years just after the Greek translations and running to nearly six hundred columns in the standard Latin printing. It opens with the most ambitious metaphysical definition early medieval Latin philosophy had attempted: natura, nature, is the totality of things that are and things that are not — everything sayable and unsayable, created and uncreated, alike — and this totality divides fourfold.

There is nature that creates and is not created: God as origin and source, the wellspring from which all proceeds. There is nature that is created and also creates: the primordial causes, the causae primordiales — the eternal divine ideas or patterns of all things, seated in the Word, at once created (because not the absolute simplicity of God himself) and creating (because through them the cosmos of particulars comes to be). There is nature that is created and does not create: the world of temporal, spatial effects, the visible cosmos of individual things. And there is nature that neither creates nor is created: God again, now seen not as source but as end, the terminus into which all returns and rests. The two outer divisions are one and the same God viewed from two angles, beginning and end; the two inner divisions are the single arc of the going-out (exitus) of creation through the eternal causes into temporal effects, and the return (reditus) by which those effects are drawn back through their causes into God. The scheme describes one circuit — outflow and homecoming — and the Stanford Encyclopedia’s standard treatment reads the four taken together as God himself, presented as the “Beginning, Middle, and End of all things” (plato.stanford.edu/entries/scottus-eriugena/).

Two technical doctrines hold the architecture together. The first is theophania, theophany: every created thing is a self-manifestation of the divine, so that scripture and the cosmos stand as two books in which God appears. Creation is not an emission of divine substance but a showing-forth, the Unknowable becoming provisionally visible in what it makes. The second is the human place in the circuit. Following Maximus, Eriugena names the human being officina omnium, the workshop of all things — the meeting point of the spiritual and material orders, the creature through whom the fragmented cosmos is gathered and carried back. The return is not the abolition of the lower grades but their deification: things are, he insists, more truly real in their primordial causes than in themselves.

God beyond being

The system’s depth lies in the negative theology it carries at both ends. God as source and God as end are equally unknowable, because God is beyond being altogether — hyperousios, more-than-being. This is the heart of the apophatic move Eriugena inherited from Dionysius and pressed further than any Latin had before. God is not a being among beings, not even the highest of them; to say he exists in the way creatures exist is already to say too much, and so in the strict sense God is nothing — the nihil not of deficiency but of excess, a fullness no concept can hold. The pupil in the dialogue is led to a conclusion later readers found vertiginous: God does not know what he is, because he is not a what. Divine self-knowledge is itself a kind of unknowing — not a defect but a perfection, the apophatic remainder that no name, not even the name of being, can capture. Every positive predication (the kataphatic moment) must be unsaid by a corresponding negation (the apophatic moment), and the negation in turn surpassed by an affirmation beyond both: God is not good as creatures are good, and is more than good. The dialectic of procession and return is, at its limit, the dialectic of speech collapsing into silence before the One.

It was this same boundary that exposed Eriugena to the charge of pantheism — of collapsing the distance between creator and creation into identity. Modern scholarship has largely judged the charge imprecise. Eriugena himself calls the claim that creatures simply are God a monstrositas, a monstrous error; for him nature is neither a whole of which God and creatures are parts nor a genus of which they are species. God is the principle in whom all things subsist, not the sum of which they are constituents, and the apophatic moment is precisely what forbids the collapse: the unknowable God-as-source can be predicated of no created being, since predication belongs to the affirmative speech that the negation must always overturn. Dermot Moran and Deirdre Carabine accordingly read him as a panentheist and idealist rather than a pantheist — every assertion of divine immanence balanced by an assertion of divine transcendence.

Condemnation and survival

The Church’s verdict was harsh and slow, and it must be told in layers, because the condemnations attach to different works. The predestination censures of 855 and 859 fell on the early treatise. The Periphyseon itself drew fire only much later, when its language of theophany and return was read through the pantheism of Amalric of Bène and his followers, condemned at Paris in the early thirteenth century; an archbishop charged that the Amalrician errors had been “collected in the book of Master John the Scot,” and the dialogue was implicated at the provincial Council of Sens (c. 1210). In 1225 Pope Honorius III confirmed the condemnation in the bull beginning Inimicus homo, ordering that the book — which he described as swarming with the worms of heretical perversity — be hunted down and burned. Copies were in fact consigned to the fire. After Thomas Gale printed the Latin text at Oxford in 1681, Rome placed the Periphyseon on the Index of Prohibited Books in the mid-1680s, where it stayed until the Index was abolished in 1966.

Yet the book never quite disappeared. It survived in a twelfth-century compendium of excerpts, the Clavis Physicae of Honorius Augustodunensis; its negative theology and its language of return reached the School of Saint-Victor and then the Rhineland, where Meister Eckhart drew on the same Dionysian-Eriugenian register of the Godhead beyond God. In the fifteenth century Nicholas of Cusa owned a copy and read it closely, and the doctrine of learned ignorance — that God is known most truly in the acknowledgment that he cannot be known — is unthinkable without this line. The nineteenth century rediscovered Eriugena as a philosopher: Hegel, in his lectures on the history of philosophy, dated the beginning of genuine medieval philosophy to Eriugena, adding the caution — repeated ever since — that he must not be confused with John Duns Scotus of a later age, and judging that with Eriugena true philosophy first begins.

The texts and the scholarship

No complete English translation of the Periphyseon lies in the public domain; the work’s openly available complete form is still the Latin. The foundational modern Latin text is Heinrich Joseph Floss’s edition in J.-P. Migne’s Patrologia Latina, volume 122 (Paris, 1853), which collects Eriugena’s surviving works together — the De divisione naturae, the Versio Dionysii, the version of Maximus, and the commentary on the Celestial Hierarchy — and preserves the text of Honorius III’s bull in its preface; Thomas Gale’s Oxford editio princeps of 1681 stands behind it. The first complete English study was Henry Bett’s Johannes Scotus Erigena: A Study in Mediaeval Philosophy (Cambridge University Press, 1925), preceded by Alice Gardner’s Studies in John the Scot (Erigena) (Oxford, 1900); both are now in the public domain. William Turner’s article in the 1909 Catholic Encyclopedia (newadvent.org/cathen/05519a.htm) gives a contemporary scholarly framing, including the chain of the reditus by which the elements rise through light, life, sense, reason, and intellect to their return through Christ.

The critical foundations are recent. Édouard Jeauneau’s five-volume edition in the Corpus Christianorum Continuatio Mediaevalis (Brepols, 1996–2003) reconstructed the layered recensions of the dialogue and superseded the older composite Latin text, building on the facing-Latin-and-English Dublin edition of I. P. Sheldon-Williams, Ludwig Bieler, and John J. O’Meara. The standard Anglophone interpretive studies are Dermot Moran’s The Philosophy of John Scottus Eriugena (Cambridge, 1989), which frames him as a proto-idealist whose dialectic anticipates later German philosophy, and Deirdre Carabine’s two books — The Unknown God: Negative Theology in the Platonic Tradition, Plato to Eriugena (Eerdmans, 1995) and John Scottus Eriugena (Oxford, 2000) — the standard treatments of his apophatic theology; John J. O’Meara’s Eriugena (Oxford, 1988) remains the compact biography, and Willemien Otten’s “The Dialectic of the Return in Eriugena’s Periphyseon” (Harvard Theological Review 84, 1991) (cambridge.org) analyzes the structure of the reditus that organizes the whole. The current synthesis is Moran’s article in the Stanford Encyclopedia of Philosophy, which stresses that Eriugena’s Neoplatonism reached him not from Plotinus, Porphyry, or Proclus directly but through the Greek Fathers he himself translated.

Modern scholarship treats Eriugena less as a heretic than as the point where Greek Christian Neoplatonism entered Latin thought whole — the rigor of his system, and its strangeness, belonging to a mind working largely without precedent in its own language.

→ In the library: Pseudo-Dionysius — The Works of Dionysius the Areopagite (Parker, 1899)

→ Related: Neoplatonism · Nicholas Of Cusa · Emanation · Augustine Of Hippo · Middle Ages · Pseudo Dionysius The Areopagite · Christian Neoplatonism · Apophatic Theology · Proclus · Meister Eckhart · Duns Scotus