Dio Chrysostom — The Golden-Mouthed Exile, Stoic-Cynic Philosopher, and Voice Against Slavery (c. AD 40 – c. 115)

Dio of Prusa — given the epithet Chrysostom, "golden-mouthed," for an eloquence remarkable even in an age that prized eloquence above almost everything — was a Greek orator, philosopher, writer, and historian of the Roman Empire, born around AD 40 in Prusa (modern Bursa in Turkey), educated in the Greek rhetorical and philosophical traditions of Bithynia, converted to Stoicism in Rome under the influence of Musonius Rufus, banished from Italy and Bithynia around AD 82 by the Emperor Domitian — too frank in his criticism of imperial power, too close to a senator who was executed — who adopted the life of a wandering Cynic philosopher for fourteen years, traveling in rags through Thrace, Mysia, Scythia, and the country of the Getae, carrying nothing but a copy of Plato's Phaedo and Demosthenes's "On the False Embassy," and discovering in poverty and exile the philosophical clarity that his earlier career as a successful sophist had obscured.

When Domitian was murdered in AD 96, Dio used his connections with the frontier army to support the emperor Nerva, returned from exile, and began a second career — this time as a philosopher-orator in the full sense: someone who used the resources of rhetoric not for display or self-advancement but for the moral improvement of audiences from slaves to emperors. He addressed the people of Alexandria on their mob behavior. He addressed the people of Priene, Rhodes, and Tarsus on their civic vices. He addressed the Emperor Trajan on the virtues required of a good ruler. He argued — uniquely among ancient moralists — for the abolition of slavery. He died sometime around AD 115, eighty discourses surviving.

His central concern: that virtue required practice and not merely knowledge, that the philosophical life was available to those who chose it regardless of circumstance, wealth, or status, and that the gap between what people said they valued and how they actually lived was the primary target of philosophical speech.

The Sophist and His Conversion — Two Lives, One Man

Dio's life divided cleanly into two phases separated by the transformative rupture of exile. In the first phase he was a sophist — a professional orator who believed that eloquence was the highest human achievement, wrote polemics against philosophers (including Musonius Rufus), and enjoyed the patronage and public prestige that came with being one of the finest speakers in the Roman east. He was praised, he traveled comfortably, he held offices in Prusa.

The exile ended this. Stripped of his property and forbidden to return to his homeland, he was forced into a literal enactment of Cynic philosophy: wearing a threadbare cloak, wandering penniless, avoiding large cities where his identity might attract attention, speaking in markets and at crossroads to whoever would listen. He described this period, in his later orations, as a profound moral education — one that replaced the sophistical ideal of eloquence as an end in itself with the philosophical ideal of speech as a means to truth and virtue. When he returned, he was a different kind of orator entirely.

"He claimed that, on the advice of the Delphic oracle, he put on the clothes of a beggar, and with nothing in his pocket but a copy of Plato's Phaedo and Demosthenes's On the False Embassy, he lived the life of a Cynic philosopher, undertaking a journey to the countries in the north and east."

The Euboean Oration — Virtue in Poverty

The most celebrated of Dio's discourses — Oration 7, the "Euboean" — opened with what read like a personal memoir: a shipwreck on the coast of Euboea, Dio rescued by a poor hunter living with his family in a remote part of the island beyond the reach of civilization. The family was poor, uneducated, cut off from urban culture — and entirely virtuous. They lived without luxury, without political corruption, without the vices that Dio associated with city life and commercial wealth.

The oration then pivoted to a broader argument: that poverty was not an obstacle to the good life but could be, under the right conditions, its natural habitat. The corrupt life was the life of cities, of competitive wealth, of the prostitution, flattery, and moral degradation that urban commercial culture produced. Against this, the honest labor of the poor — farming, herding, simple craft — was compatible with genuine virtue in a way that the sophisticated corruption of wealth was not. Dio was not romanticizing poverty for its own sake — the oration distinguished between ennobling poverty and degrading destitution — but arguing that the moral resources for a good life were more widely distributed than his wealthy audiences assumed.

"The Euboean Oration presents Dio as a wanderer who encounters poor but virtuous rural people, using the story to contrast simple, honest labor with the moral corruption of luxury and urban life."

Against Slavery — The Most Radical Argument

Dio's discourses on slavery and freedom were, by the consensus of modern scholars, the most radical position taken by any preserved ancient moralist. He appears to be the only ancient author whose surviving texts straightforwardly called for the abolition of slavery.

His argument drew on Stoic philosophy: all human beings shared in reason and in the divine logos — there was therefore no natural basis for the distinction between free persons and slaves. The Stoic concept of "natural slavery" — the Aristotelian notion that some people were slaves by nature — he rejected explicitly. He also deployed a Stoic inversion: true slavery was not the condition of being legally owned by another person but the condition of being enslaved to one's own passions — and this form of slavery was equally available to the legally free. The free man dominated by his desires was more truly a slave than the legally enslaved person who had mastered himself.

These were standard Stoic moves — but Dio pressed beyond them to the institutional conclusion that few others drew: the actual practice of slavery was wrong and should be abolished. His critics note the irony that after his return from exile he sought to recover his own lost slaves. The tension between his philosophical arguments and his personal behavior was a tension he apparently did not fully resolve.

"Dio Chrysostom is more critical of slavery than any other ancient author. He appears to be the only preserved ancient moralist to outright call for the abolition of slavery — drawing on the Stoic idea that harming others is bad for the harmer, and that natural slavery does not exist."

The Orations on Kingship — Philosophy to Power

The four Orations on Kingship — addressed to the Emperor Trajan — were Dio's most politically prominent works and his most direct engagement with the question of what philosophy owed to power, and power owed to philosophy. Drawing on Stoic and Platonic ideals, he argued that the good ruler was not the one who maximized his personal power but the one who governed in imitation of divine justice — who showed self-restraint, paternal care for subjects, and an absolute rejection of flattery.

The Diogenes-Alexander confrontation that appeared in several discourses was a recurring image for this ideal: the philosopher who had nothing and needed nothing standing before the emperor who had everything and wanted more, and the emperor recognizing in the philosopher's freedom something he himself could not possess. Whether Trajan actually received or read these orations is uncertain — but Dio claimed a personal friendship with the emperor, and the orations were publicly delivered. The claim that philosophy should advise power, not flatter it, was made in the most direct possible way.

"The Kingship Orations stress the ruler's imitation of divine justice, self-restraint, and paternal care for subjects — drawing from Homeric and Platonic ideals while critiquing flattery and excess."

The Eclectic Philosopher — Stoic, Cynic, Platonist

Dio was not an original systematic philosopher — he drew his philosophy from Plato, the Stoics, and the Cynics and synthesized rather than invented. His contribution was the application of philosophical ideas to the widest possible range of practical situations — the affairs of individual cities, the moral failures of specific emperors, the practical ethics of how the poor could earn a living with dignity. Philosophy for Dio was not an academic discipline but a form of public speech directed at specific audiences about their specific moral conditions.

His Oration 36 — the "Borystenean," set at Borysthenes near modern Odessa — went further than most, incorporating what he claimed was a Persian myth about the origin and destiny of souls, showing the range of his cultural reach and his willingness to draw philosophical material from traditions outside the Greek mainstream.

"He was not an original thinker, but drew his philosophy from Plato, the Stoics and Cynics, and felt it to be his life-work to proclaim these teachings to all — high and low, prince and peasant — by informal addresses to small groups and set addresses to larger assemblies."

Legacy — Philosophy as Public Speech

Dio was described by the philosopher Eunapius as the Greek equivalent of Xenophon — someone who had united philosophical insight with active public life and eloquent expression. Synesius of Cyrene devoted a treatise to him, "Dion, or On Living According to Nature," arguing that Dio's life was a model for the philosopher who combined literary polish with genuine ascetic commitment.

"Wearing but a threadbare cloak, he wandered penniless from place to place, as a rule avoiding the large cities — and discovered in this wandering the philosopher he had failed to become when he was comfortable."