Quick Answer
A fifth-century Roman official took ten pages from the end of Cicero's Republic and wrote two books explaining them, and in doing so preserved the only part of that work Europe would have for the next fourteen centuries. The commentary also produced the classification of dreams that medieval and Renaissance writers used, and taught the West most of what it knew about Plato's cosmos before the twelfth century.
Key Takeaways
- Cicero's Republic was lost. The Dream survived only because Macrobius quoted it, until a palimpsest turned up in 1819.
- The five kinds of dream are his transmission, and they governed European dream theory for a thousand years.
- He is a compiler, not an original mind, and saying so is not a criticism given what the compilation did.
- The descent of the soul through the spheres reaches later Western esotericism largely through this book.
- Chaucer names him by name at the opening of a poem, which is a fair measure of how widely he was read.
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What This Book Is
Around the beginning of the fifth century, a Roman named Macrobius Ambrosius Theodosius wrote a commentary in two books on a short passage from Cicero.
The passage is the closing section of Cicero's De Re Publica, written in the 50s BC, and known as the Dream of Scipio. It runs to about ten pages. Macrobius's commentary on it runs to a couple of hundred, and only a fraction of that is directly about Cicero. The rest is a complete Neoplatonic education: the nature and destiny of the soul, the structure of the heavens, the classification of the virtues, the properties of numbers, the theory of harmony, the geography of the earth, and the interpretation of dreams.
The form is a late antique convention. A commentary is not a modern annotation; it is a container. You take a revered short text and use each phrase as an occasion to expound whatever the subject requires, and the result is an encyclopedia with a spine borrowed from somebody else.
On the two Macrobius books: he also wrote the Saturnalia, a long symposium dialogue set during the winter festival, in which learned Romans discuss Virgil, religion, food and jokes. It is a different kind of work entirely and is the other reason his name survives.
What the Dream Actually Says
Cicero's Dream deserves its own summary, because most people meet it only through Macrobius and it is a remarkable piece of writing on its own.
Scipio Aemilianus, the younger Scipio, is in Africa in 149 BC before the destruction of Carthage. He dreams that his adoptive grandfather, Scipio Africanus, the man who beat Hannibal, appears to him.
Africanus takes him upward. From a great height Scipio sees the nine spheres, the fixed stars outermost and the moon lowest, and hears the sound they make in their motion, a harmony produced by the intervals of their speeds. He is told that human beings do not hear this because their ears have been filled with it since birth, in the way that people who live beside a cataract cease to notice the noise.
Then he looks down, and the point of the whole passage arrives. The Roman empire, at the height of its power, is a small patch on a small continent on a small globe. The inhabited zones are separated by ocean and by heat and cold so that no reputation can cross between them. And even within one zone, fame lasts less than a single great year, the vast period after which the heavens return to their starting positions.
Africanus draws the conclusion. Do not act for the sake of human fame, which cannot reach far and does not last. Act because there is a place prepared in the heavens for those who serve their country justly, and because the soul is not the body. The soul is what moves itself, and what moves itself never ceases to move, and is therefore immortal.
Notice what Cicero is doing. He is a Roman statesman, writing about the republic, and he closes the whole work by telling Romans that Rome is invisible from a very short distance up and that reputation is worthless. And then he tells them to serve it anyway, for a reason that has nothing to do with recognition. It is one of the most severe arguments for public duty ever written, and it works by removing every ordinary motive for it.
Why It Survived and Cicero Did Not
Here is the fact that makes this book historically enormous.
Cicero's De Re Publica was lost. Not partially, not in fragments quoted here and there; the work as a whole disappeared from circulation in the early Middle Ages and was gone.
What survived was the Dream, and it survived because Macrobius had quoted it and commented on it, and Macrobius was copied continuously. For something like fourteen hundred years, the ending of Cicero's political masterpiece existed in European libraries as an appendage to a late antique commentary.
The rest of the Republic came back only in 1819 and 1820, when Angelo Mai identified it underneath a later text in a Vatican palimpsest, a manuscript whose original writing had been scraped off so the parchment could be reused. Even now it is incomplete.
So the situation is this: a compiler of no great originality wrote a commentary on ten pages of a book that then vanished, and by doing so saved those ten pages, which went on to shape the cosmology, the dream theory and the moral imagination of medieval Europe. Whether he was a good philosopher is almost beside the point.
Who Macrobius Was
Remarkably little is known.
He was active in the late fourth and early fifth centuries. The name Macrobius Ambrosius Theodosius appears in the manuscripts, and an official of that name held senior imperial office, which is the general assumption about him: a member of the Roman governing class with an expensive education and the leisure to write.
He addresses the commentary to his son, which was a conventional framing for educational works.
What is genuinely notable is what is absent. Macrobius writes in a wholly pagan intellectual register, expounding Neoplatonic doctrine, quoting Virgil and Plato and Plotinus, in an empire that had been officially Christian for decades. He never mentions Christianity, either to attack it or to accommodate it. Whether he was a pagan holding out, a Christian writing in an inherited philosophical idiom, or simply uninterested in the question is not recoverable, and scholars have argued all three.
That silence is part of why medieval Christian readers found him so usable. There was nothing in him to argue with.
The Five Kinds of Dream
Early in the first book Macrobius does the thing he is most remembered for, and it is a small piece of classification with an enormous afterlife.
Before he can treat Scipio's dream as meaningful, he has to establish what kind of dream it is, so he sets out five categories.
The enigmatic dream conceals its meaning in figures and requires interpretation. The prophetic vision shows something that later happens as shown. The oracular dream is one in which a figure of authority, a parent, a priest or a god, appears and states plainly what will happen or what should be done. The nightmare arises from distress of body or mind, from anxiety, illness, hunger or excess, and means nothing. The apparition is the figure seen in the drifting state between waking and sleep, and also means nothing.
Only the first three are worth interpreting. The last two are noise.
This scheme was adopted more or less wholesale by medieval and Renaissance Europe. It is the framework behind an enormous amount of literature, and Chaucer, who read Macrobius directly, structures dream poems around it. It survived because it is genuinely useful: it distinguishes dreams that carry information from dreams that are the mind processing a heavy meal, and it does so without dismissing either category.
Anyone working with dream interpretation today is operating downstream of it, whether or not they know the source.
The Descent of the Soul
The philosophical heart of the commentary is the account of what the soul is and where it has come from.
Following the Neoplatonic tradition, Macrobius describes souls as originating above and descending through the spheres toward embodiment. In the version he transmits, the descent begins in the region of the Milky Way, and as the soul passes through each planetary sphere it takes on a capacity, or a limitation: reason from one, the power of action from another, appetite, perception, motion, and so on down to the body.
Birth, on this account, is the completion of a fall. Death is the beginning of the return, in which the soul sheds at each sphere what it acquired there.
Two things are worth saying about this. First, it is not Macrobius's idea; it comes through Porphyry and the wider school, ultimately from Plato with a great deal of intervening development. Second, it is one of the single most consequential passages in the transmission of Western esoteric thought. The doctrine that the soul acquires its faculties from the planets, and can shed them, feeds directly into medieval and Renaissance astrology, into Ficino, and into the whole later tradition of planetary correspondence.
Anyone reading modern esoteric writing on the planets is reading, at several removes, this book.
The Music of the Spheres
Cicero has Scipio hear the harmony of the spheres and asks what it is. Macrobius answers at length, and this is where the commentary gets technical.
He sets out the Pythagorean account of musical intervals as numerical ratios, explains the consonances, and applies them to the distances and speeds of the celestial bodies. The result is a cosmos whose proportions are musical in a literal rather than a metaphorical sense.
He also handles the obvious objection, which Cicero raised and which is genuinely good. If the spheres are producing enormous sound, why is it silent? The answer, that continuous exposure from birth makes the sound imperceptible, is offered with the analogy of people living at a great waterfall who no longer hear it.
The technical material here mattered practically. Medieval music theory drew on Macrobius alongside Boethius, and the idea that harmony is a mathematical property of the universe rather than a human invention passed into the quadrivium and stayed there for a millennium. It connects directly to the Pythagorean mathematics that underlies the whole tradition.
The Excursus on Number
Because Cicero mentions a period of years, Macrobius stops the commentary and delivers a long treatment of the properties of numbers, with particular attention to seven and eight.
Seven receives extended attention: its role in the phases of the moon, in the stages of human life, in gestation, in the human body, in music, and in its arithmetical peculiarity of being neither generated by nor generating any number within the first ten.
By any modern standard this is arbitrary. Correspondences are collected rather than derived, and a determined person could do the same for any number.
It was nonetheless taken with complete seriousness for well over a thousand years, and it is one of the main channels through which Pythagorean number symbolism reached medieval and Renaissance Europe. If you have encountered claims about the significance of particular numbers in Western esoteric writing, a substantial share of the specific content traces back through passages like this one.
The Earth, the Zones and the Antipodes
Because Scipio looks down at the earth, Macrobius has to explain what he is looking at, and the geography is better than people expect.
He describes the earth as a sphere, which was the standard educated view in antiquity and remained so, and divides it into climatic zones: two frozen at the poles, one burning at the equator, and two temperate bands in between. He argues that there must be inhabited land in the southern temperate zone, and that its inhabitants can never be reached across the equatorial heat and the ocean, which is why Scipio is told that fame cannot travel.
Manuscripts of the commentary carry diagrams of this zonal scheme, and those diagrams are among the most widely copied geographical images of the Middle Ages. They are not maps in the modern sense, and they transmitted the idea of a spherical, zoned earth with unreachable inhabited regions to centuries of readers.
A Compiler, and Why That Is Not an Insult
An honest review has to be clear about what Macrobius is.
He is not an original philosopher. The doctrines are inherited, mostly through Porphyry and the Neoplatonic schools, and where his sources survive independently the dependence is visible. He occasionally misunderstands what he is transmitting. He assembles rather than argues, and a reader looking for the kind of close reasoning found in Plotinus will not find it here.
Set against that: he selected well, he organised clearly, he wrote lucid Latin, and he produced a book that a student could actually learn from. Those are real skills and they are rarer than originality.
More to the point, the history of ideas runs through compilers far more than intellectual histories admit. Original thinkers are frequently lost. The people who summarised them for students are copied, because copies are made for teaching. Macrobius survives because he was useful, and because he was useful, Plato's cosmos survived with him.
What the Middle Ages Did With It
Over two hundred manuscripts of the commentary survive, which places it among the most widely circulated secular texts of the period.
Before the great wave of twelfth-century translations from Arabic and Greek, Latin Europe's knowledge of Platonic cosmology came from a very short list: a partial translation of the Timaeus with Calcidius's commentary, Boethius, Martianus Capella, and Macrobius. That is close to the whole inheritance, and Macrobius carried a large share of it.
The twelfth-century Platonists associated with Chartres worked from him. Writers on the cosmos, on the soul and on the world as an ordered whole drew on him constantly. His dream classification structured centuries of visionary literature.
And Chaucer, opening The Parliament of Fowls, has his narrator describe spending the day reading an old book, names Macrobius as its author, and summarises the Dream of Scipio before falling asleep and having a dream of his own. A fourteenth-century English poet expected his audience to recognise the reference.
Where It Is Weak
Three honest limitations.
The connection to Cicero is often nominal. Macrobius will seize on a word and depart for thirty pages, and a reader hoping for illumination of the Dream itself will spend long stretches elsewhere. The commentary is a vehicle, and Cicero is the excuse.
The number symbolism does not survive scrutiny and takes up considerable space. It is historically important and it is not intellectually defensible.
And the astronomy, competent for its time, is Ptolemaic and wrong, which means the technical passages on the spheres describe a universe that does not exist. Their interest is now entirely historical, and a reader who is not interested in the history of ideas will find those sections inert.
Which Edition, and Who Should Read It
William Harris Stahl's translation, published by Columbia University Press in 1952 in the Records of Civilization series and reprinted since, is the standard English version. The introduction on Macrobius's sources and on the medieval transmission is genuinely valuable and is a substantial part of what you are buying.
Read the Dream itself first, from any translation of Cicero, before you read a word of the commentary. It takes twenty minutes and everything afterwards depends on it.
Read the commentary if you are interested in how Platonic and Neoplatonic ideas actually reached medieval Europe, because this is one of the main pipes. Read it if you work with Ficino or the Renaissance Platonists, who inherited a great deal through it. Read it if you are studying Dante or medieval visionary literature, since the cosmology behind those ascents is here.
Do not read it as philosophy in its own right. Do not read it for Cicero, because there is not much Cicero in it. And do not read it expecting an argument, because it is a curriculum rather than a case.
The exercise Cicero built in: the Dream works by changing the viewer's altitude and letting the conclusion follow. Try it deliberately once. Take something you are currently anxious about being recognised for, or blamed for, and place it accurately in space and time: on this street, in this city, on this continent, this year. Do it slowly and specifically rather than as a gesture. Then ask whether the anxiety survived the exercise. Cicero expected it not to, and he expected you to keep doing the work anyway, for a different reason.
There is a lesson in this book's survival that has nothing to do with its contents. The original was a masterpiece and it vanished. The commentary was second-rate and it lasted fourteen hundred years, and carried a fragment of the masterpiece with it. What survives is not what is best; it is what gets copied, and things get copied because they are useful to somebody in the next generation. That is worth remembering both when assessing any tradition's canon and when deciding what is worth writing down.
Ten pages of Cicero, saved by a commentary nobody thinks is great.
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Frequently Asked Questions
What is the Commentary on the Dream of Scipio?
A two-book Neoplatonic commentary written in the early fifth century by Macrobius, taking as its text the closing pages of Cicero's Republic. It uses that short passage as the occasion for a complete account of the soul, the cosmos, number, harmony and dreams, and it became one of the most widely read books of the Middle Ages.
What is the Dream of Scipio?
The final section of Cicero's Republic, in which the younger Scipio dreams that his adoptive grandfather appears to him, lifts him above the world, shows him the spheres and the music they make, and tells him that Rome is very small seen from the stars and that fame does not last. It is about ten pages long.
Why does the commentary matter so much?
Because for well over a thousand years it was the only reason the Dream survived. The rest of Cicero's Republic was lost, and was not recovered until a palimpsest was identified in the Vatican in the early nineteenth century. Medieval Europe knew the Dream because Macrobius quoted it.
What are Macrobius's five kinds of dream?
The enigmatic dream, the prophetic vision, the oracular dream, the nightmare arising from bodily or mental disturbance, and the apparition seen at the edge of sleep. Only the first three carry meaning worth interpreting. This scheme governed European dream theory for a thousand years.
Who was Macrobius?
A Roman of the late fourth and early fifth centuries, almost certainly a senior imperial official, who wrote in a learned pagan register at a time when the empire had become Christian. Very little is known about him personally, including whether he was himself a Christian, and he never mentions Christianity.
Was he an original thinker?
No, and it is important to say so. Macrobius is a compiler working largely from Porphyry and from the wider Neoplatonic tradition, and much of the commentary is transmitted material rather than his own reasoning. His value lies in what he preserved and how well he organised it for later readers.
What is the descent of the soul?
The doctrine that souls descend from the Milky Way through the planetary spheres toward birth, acquiring a faculty or a defect from each sphere as they pass, and reverse the process after death. Macrobius sets it out clearly, and it became a standard framework in later Western esoteric and astrological thought.
What is the music of the spheres in this book?
The doctrine that the spheres produce tones by their motion, that the intervals between them are harmonic, and that we do not hear the resulting music because we have been immersed in it since birth. Macrobius gives a technical treatment of the ratios, which is one reason the book mattered to medieval music theory.
What is the excursus on numbers?
An extended passage on the properties of numbers, particularly seven and eight, drawing on the Pythagorean tradition. By modern standards it is arbitrary numerology, and it was taken seriously for centuries and is the source of a great deal of later number symbolism in Europe.
Who read it in the Middle Ages?
Almost everyone with an education. Over two hundred manuscripts survive. It shaped the twelfth-century Platonists of Chartres, it carries some of the earliest medieval world diagrams, and Chaucer names Macrobius directly at the opening of The Parliament of Fowls as the author he had been reading.
Does it contain a world map?
Manuscripts of it carry zonal diagrams of the earth showing climatic bands and an inhabited southern region, which are among the most widely copied geographical images of the medieval period. The text also discusses the antipodes and the extent of the ocean.
Which translation should I read?
William Harris Stahl's translation for Columbia University Press, first published in 1952, is the standard English version and includes a substantial introduction on the sources and the transmission. It remains the edition scholars cite.
Go up, then come back down
Cicero's whole method in the Dream is one move: raise the viewpoint until the thing you are worried about is the correct size, and then return and do the work anyway. Most modern uses of that move stop halfway, at the part where nothing matters, and call it perspective. Cicero does not let you stop there. Having shown Scipio that Rome is a dot and fame is nothing, he tells him to go back down and serve it properly. The altitude is not an exit. It is what makes the return honest.
Sources & References
- Macrobius. Commentary on the Dream of Scipio, trans. William Harris Stahl. Columbia University Press, Records of Civilization.
- Cicero. De Re Publica, Book 6, the Dream of Scipio.
- Macrobius. Saturnalia, his other surviving work.
- Porphyry, the principal source behind much of the commentary's Neoplatonic content.
- Plotinus. The Enneads, the philosophical background to the doctrine of the soul.
- Mai, A. The 1819 identification of the Vatican palimpsest that restored the rest of Cicero's Republic.
- Chaucer, G. The Parliament of Fowls, which names Macrobius in its opening lines.