The later third century, roughly AD 260 to 305, was not a calm moment for Christianity. It was the most shaken, destabilized, and vulnerable moment the Roman Empire had experienced since the fall of the Republic. The empire’s myths of invincibility had shattered. The perception that the gods protected Rome had collapsed. No event demonstrated this more brutally than the humiliation of Emperor Valerian in the AD 250s.
Pagan historian Aurelius Victor gives the most chilling description of the moment:
“Valerian was captured in battle and taken into Persia. They kept him there until he died, and after his death they stripped the skin from his body along with the imperial purple.”
Aurelius Victor, Epitome of the Caesars 33.4
This was not just a military defeat. It was a cosmic humiliation. Rome’s entire self-identity trembled. People questioned everything: the order of the universe, the protection of the gods, the meaning of tradition, the future of the empire.
At the same time, Christianity was rising. Christianity had not collapsed under Decius. It had not shattered under Valerian. It grew and spread. It acquired intellectual converts. It developed Scriptures, bishops, and theological schools. It formed moral communities that stood out in a collapsing world. Even the elite philosophical schools of Rome were encountering Christian arguments face to face.
This is where Porphyry enters the story. He was born around AD 232 and lived into the early AD 300s. He grew up in a world where Rome was cracking, yet Christianity was accelerating.
The World That Formed Porphyry: Plotinus and the Defense of the Ancient Tradition
Porphyry came to Rome around AD 263 and became a student of Plotinus, one of the most revered philosophers of antiquity. His biography of Plotinus, written later, gives us rare insight into the intellectual environment that shaped his thinking.
Porphyry writes:
“Plotinus seemed ashamed of being in the body. He refused to speak about his birth, his parents, or his homeland, and was so ashamed of being in the body that he would not allow anyone to make a portrait of him. He said it was enough to bear the likeness of the body in which he was clothed.”
Life of Plotinus 1
Plotinus’s disdain for the body, for history, and for physicality formed the foundation of Porphyry’s worldview. Christianity, with its proclamation of a God who takes on flesh, enters time, suffers, dies, and rises in a body, contradicted everything Plotinus considered philosophically exalted.
Plotinus also condemned new religious movements that claimed to supersede ancient wisdom. Porphyry records:
“Certain people who had recently taken up teaching began to speak arrogantly, pretending that they had discovered the complete truth, though they perverted the doctrines of the ancients and invented fictions of their own.”
Life of Plotinus 3
And again Porphyry writes:
“Many others who had recently come forward asserted that they had discovered the complete truth, though they corrupted the oracles of the ancient sages and fabricated fictions of their own.”
Life of Plotinus 16
Scholars broadly agree that Plotinus is referring here to Christians, whose claims of a new revelation threatened the philosophical tradition he defended.
Porphyry also records one of the earliest direct testimonies of a philosophical debate between pagans and Christians. A Christian named Antoninus was part of Plotinus’s circle. Porphyry writes:
“Among those who came to Plotinus was also a certain Antoninus, who had forsaken the old religion and embraced the doctrine of the Christians. Plotinus argued with him many times, attempting to turn him away from these opinions, but could not succeed. Antoninus held firmly to the Scriptures of the Christians and would not give them up.”
Life of Plotinus 3
This is extraordinary. Plotinus, the greatest philosopher of his age, debated a Christian convert and was unable to win him back.
Porphyry witnessed all of this. He watched Christianity enter the philosophical elite. He watched his own teacher fail to defeat a Christian convert. This moment planted the seed of Porphyry’s later hostility.
What Plotinus Taught Porphyry About Scripture, Myth, and Truth
Porphyry also records Plotinus’s view that sacred texts must not be interpreted literally:
“Plotinus declared that myths and sacred writings must not be taken literally, but understood allegorically, for the literal meaning was often absurd.”
Life of Plotinus 22
This is the principle Porphyry later applies to Christian Scripture.
Plotinus insisted that true wisdom was ancient and that new movements were false. Porphyry writes:
“Plotinus taught that the ancient philosophers had already discovered the truth, and that the doctrines of those who had recently arisen were false and filled with contradictions.”
Life of Plotinus 18
Porphyry accepted this fully.
Christianity was recent.
Christianity contradicted ancient wisdom.
Therefore Christianity must be false.
Plotinus also revered the ancient gods:
“Plotinus had a reverence for the gods and delighted in the ancient rites, saying that they were established by wise men of old and should be preserved.”
Life of Plotinus 23
Porphyry embraced this same reverence and used it to criticize Judaism and Christianity for destroying images, rejecting rituals, and breaking from ancestral customs.
Porphyry’s Fifteen-Book Against the Christians
Somewhere between AD 270 and 300, Porphyry composed his massive fifteen-volume polemic titled Against the Christians. Christian emperors later condemned and destroyed it. The order survives in the Theodosian Code, issued under Theodosius II in AD 448:
“The books of Porphyry, written against the religion of the Christians, shall be sought out and burned with fire.”
Theodosian Code 16.5.66 (AD 448)
Because the work was destroyed, we depend on later authors who quoted Porphyry in order to refute him. Whenever one of these sources appears for the first time in this script, it receives a brief introduction so the reader knows who they are.
Porphyry’s surviving arguments attack every foundation of the Christian movement:
Moses and the Pentateuch.
The historical books of Scripture.
The Gospels.
Paul.
Christian prophecy, especially Daniel.
Christian miracles.
Christian exclusivism.
Christian literalism.
Christian rejection of images.
Jewish dietary laws that early Christians inherited.
Christian abandonment of ancestral customs.
Christian claims of new revelation.
Porphyry’s Attack on Moses and the Pentateuch
Our first witness is Eusebius of Caesarea, the early fourth-century Christian historian who wrote Church History and Preparation for the Gospel. Eusebius quotes Porphyry in order to refute him. From him we learn that Porphyry denied Mosaic authorship:
“Porphyry impugns Moses and says the writings attributed to him are not by him, but by others long after his time.”
Eusebius, Preparation for the Gospel 1.9
Porphyry also argued that Moses borrowed from Greek philosophy, reversing the Christian idea that Greek wisdom borrowed from Israel.
Porphyry’s Attack on the Gospels
Macarius Magnes was an early fourth-century Christian writer who composed a dialogue titled the Apocriticus. In it he quotes a pagan critic at length before responding. Scholars agree that the arguments he preserves come directly from Porphyry’s Against the Christians.
Macarius records Porphyry saying:
“The evangelists were unskilled men and of no education. Their writings are devoid of art. They show not malice but lack of ability.”
Apocriticus 3.2
Macarius also preserves Porphyry accusing the Gospels of contradiction:
“Your writings are full of contradictions. One says one thing. Another writes something different. Each evangelist follows his own fancy.”
Apocriticus 2.6
And again:
“You are compelled to make up explanations to make them agree.”
Apocriticus 3.9
Porphyry even challenges the resurrection appearances:
“Why did Jesus not show himself openly after he rose? Why did he appear only to a few? A god should have shown himself to all.”
Apocriticus 3.9
Porphyry’s Attack on Paul
Augustine of Hippo, writing in the late fourth and early fifth centuries, preserves Porphyry’s criticism of Paul in The City of God:
“Porphyry reproaches Paul for abandoning the law and introducing new doctrines.”
Augustine, City of God 19.23
Porphyry believed Paul corrupted the original Jewish faith and created a dangerous innovation.
Porphyry’s Attack on Christian Literalism
Macarius preserves Porphyry’s criticism of how Christians read Scripture:
“Your Scriptures contain myths and fables no better than the tales of the Greeks.”
Apocriticus 4.21
Porphyry argues that Christians interpret their writings in the most literal and unsophisticated way possible.
Porphyry’s Attack on Christian Exclusivism
The next source is the Suda, a massive tenth-century Byzantine encyclopedia that preserves brief quotations from older writers. It records Porphyry’s complaint:
“Porphyry wrote that the Christians forsake the customs of their ancestors and presume to condemn all others.”
This is one of the earliest pagan descriptions of the Christian claim that salvation comes only through Christ.
Porphyry’s Attack on Christian Miracles
In addition to the Gospels and Paul, Porphyry challenged the Christian claim that miracles proved Jesus was divine. Augustine of Hippo, writing in the early fifth century, preserves this line of argument. Augustine quotes Porphyry directly in The City of God, where he records Porphyry arguing that Jesus’ miracles were not unique at all:
“There are many others who have worked wonders no less than Jesus, yet they are not on that account gods.”
Augustine, City of God 10.32
For a philosopher formed by Plotinus, miracles proved nothing.
Medicine, magic, and religion could all produce wonders.
Jesus, Porphyry argued, belonged to a wider class of healers and holy men who never claimed to be divine.
Macarius Magnes preserves a similar statement from Porphyry’s lost work:
“If Jesus performed miracles, so have many others before him. Why then do you call him God when others who have done the same things are not gods?”
Apocriticus 3.6
For Porphyry, miracles were not evidence of divine identity.
They were common features of the ancient world.
Christians, he insisted, were naïve for treating them as proof.
Porphyry’s Attack on Christian Epistemology
Porphyry also attacked Christianity at its strongest point — its claim that the resurrection, apostolic testimony, Scripture, and the moral transformation of believers together provided a compelling reason for belief.
Macarius Magnes preserves Porphyry’s criticism of the Christian appeal to faith:
“You Christians have no demonstration for what you believe. You accept everything on faith alone, without proof.”
Apocriticus 4.19
This is one of the earliest explicit arguments that Christianity lacks philosophical evidence.
Porphyry demanded the kind of demonstration valued by the Platonic schools.
Christians responded that history, revelation, eyewitness testimony, prophetic fulfillment, and moral transformation constituted a different kind of proof.
Eusebius, writing in the early fourth century in direct response to Porphyry, explained it this way:
“Our faith is not based on clever reasoning but on the power of truth shown in deeds.”
Eusebius, Demonstration of the Gospel 1.5
Porphyry forced Christian writers to clarify the nature of Christian evidence.
They insisted they were not offering abstract philosophical argument but historical testimony to events God had done.
Porphyry’s Attack on Jewish and Christian Dietary Practices
Another preserved piece of Porphyry’s work comes from his treatise On Abstinence from Animal Food. In this work, Porphyry discusses the practices of several cultures, including the Jews. His comment is brief but revealing:
“The Jewish nation abstains from swine and certain other animals, not for reasons of purity, but because of ancient ancestral customs.”
On Abstinence 2.36
This statement is significant for two reasons.
First, Porphyry denies that Jewish dietary laws reflect divine command.
Second, he treats these customs as merely ethnic and cultural.
Early Christians inherited aspects of this Jewish debate and were still wrestling with food laws in the second and third centuries. Porphyry’s dismissal of these practices as “ancestral customs” fits with his larger claim that Christian practices were human inventions, not divine revelations.
Porphyry’s Attack on Jewish and Christian Views of Images
Porphyry also wrote a separate work titled On Images, in which he defended the philosophical value of pagan images, statues, temples, and rituals. Although the work does not survive, Eusebius preserves Porphyry’s arguments.
Eusebius tells us:
“Porphyry says images are symbols that lift the mind to the gods, and that the Jews are impious for destroying them.”
Eusebius, Preparation for the Gospel 3.6
This helps us understand two important points.
First, Porphyry believed that pagan worship involved profound symbolism, not superstition.
Second, he saw Jewish and Christian hostility to images as ignorant, impious, and culturally destructive.
Christianity’s refusal to honor images — its refusal to sacrifice, its refusal to join civic rituals, and its rejection of pagan temples — was, in Porphyry’s eyes, a direct assault on everything wise and ancient in the empire.
For Porphyry, the ancient rites deserved respect. Christians, he believed, were tearing down the cultural world that preserved truth.
Porphyry’s Appeal to Pagan Oracles
Porphyry did not only defend pagan tradition.
He argued that the gods actively revealed truth through the ancient oracles.
He wrote a now-lost work titled On the Philosophy from Oracles.
Much of it was destroyed by Christian emperors, but Eusebius preserves a summary:
“Porphyry says that the gods speak in oracles and reveal to us the ways of virtue and truth.”
Eusebius, Preparation for the Gospel 4.7
This is crucial for understanding Porphyry’s worldview.
For Porphyry:
The gods reveal truth through ancient rituals.
The philosophers preserve this truth through reason.
The ancestral traditions embody this truth through symbol and rite.
Christianity, in his eyes, had none of this.
It was recent, literalistic, exclusive, and dismissive of the traditions that carried the wisdom of antiquity.
This is why Porphyry regarded Christianity not as harmless but as culturally and philosophically dangerous.
Porphyry’s Attack on Daniel
Porphyry’s longest and most detailed attack focused on the Book of Daniel. More of his words survive here than on any other topic because the Christian scholar Jerome quoted him extensively in his fourth-century Commentary on Daniel.
Jerome explains Porphyry’s argument this way:
“Porphyry wrote his twelfth book against Daniel, denying that he was a prophet, but asserting that all the things narrated in his book happened in the past, under Antiochus Epiphanes, and that Daniel did not predict the future but reported the past in the form of prophecy.”
Jerome, Commentary on Daniel 11.5
Porphyry argued that Daniel’s predictions were too accurate regarding the events of the second century BC.
He concluded the book was written during the Maccabean crisis, not in the sixth century BC.
Jerome quotes Porphyry further:
“Nearly all the things he relates in this chapter have been fulfilled. He tells of Antiochus who fought against the king of Egypt. But he lies when he adds other things which did not take place at all.”
Jerome, Commentary on Daniel 11.5
Porphyry’s point was simple.
Daniel describes historical events accurately until a certain point.
After that point the predictions fail.
Therefore, Daniel was a historical narrative pretending to be prophecy.
Jerome’s frustration is evident.
He admitted:
“Porphyry followed the history so closely that he cannot be refuted except by saying that Daniel truly foretold the future.”
Jerome, Commentary on Daniel 11.5
For Christians, Daniel was foundational evidence that God reveals future events.
Porphyry’s attack struck at the heart of Christian apologetics.
Hierocles: A Roman Governor Attacking Christianity During the Persecution
At the same time Porphyry was sharpening the philosophical attack against Christianity, another voice emerged from within the Roman administration itself. Hierocles was a high-ranking Roman governor under Diocletian, first in Bithynia and later in Alexandria. Around the very moment the Great Persecution began in AD 303, he composed a work titled Philalethes (“Lover of Truth”), one of the most important pagan attacks on Christianity from the early fourth century.
Unlike Porphyry, Hierocles was not a philosopher speaking from a school.
He was a Roman official speaking from authority.
His critique reveals how Christianity was viewed by those charged with protecting the Roman order.
Eusebius, who lived through the same period, wrote a direct refutation titled Against Hierocles between AD 310 and 313 and quotes Hierocles at length.
Hierocles’s central claim was that Jesus was nothing special and that Christians foolishly exalted Him above other wise men such as Apollonius of Tyana. Eusebius preserves the argument clearly:
“Hierocles endeavors to show that Apollonius was more divine than Jesus, and reproaches us for worshipping Him whom he calls an ordinary man, while we overlook Apollonius, who performed more wonderful deeds.”
Eusebius, Against Hierocles 1 (AD 310–313)
Hierocles insists that Jesus accomplished nothing unique:
“He asserts that Jesus performed nothing remarkable, but that the apostles invented tales of His miracles out of foolishness, whereas Apollonius, he says, displayed greater power and wisdom.”
Against Hierocles 2
He mocks Christians for exclusive devotion to Jesus:
“He accuses us of folly, saying that while we overlook many men who have performed great deeds, we have exalted Jesus alone, though He accomplished nothing worthy of such honor.”
Against Hierocles 4
He even compares their trials:
“He says that Apollonius, when tried by the emperors, displayed courage and divine power, whereas Jesus, dragged before Pilate, showed nothing divine and suffered an inglorious death.”
Against Hierocles 4
He attacks Christian Scripture:
“He mocks us for preferring the barbaric writings of the Christians to the wise and philosophical doctrines of the Greeks.”
Against Hierocles 3
He denies Christian moral superiority:
“He says that what we admire in Christian conduct is found more beautifully among the philosophers, who taught moderation, justice, and wisdom long before.”
Against Hierocles 5
He mocks Christian intellectual status:
“He derides the simplicity of the faith, calling it the belief of unlearned men who know nothing of true philosophy.”
Against Hierocles 3
And he attacks Christian miracle claims:
“He says that the deeds attributed to Jesus are neither new nor extraordinary, for many have worked similar wonders, yet none of these are worshipped as gods.”
Against Hierocles 4
His conclusion is blunt:
“He declares that Christians have been deceived by exaggeration, exalting Jesus beyond measure, when in reality He was no greater than many others.”
Against Hierocles 1
Hierocles therefore stands beside Porphyry as one of the clearest voices opposing Christianity just as the Great Persecution began. He represents the mindset of Roman officials who saw Christianity not only as theologically dangerous but socially destabilizing and philosophically unimpressive.
Christian Responses to Porphyry
Porphyry triggered more Christian responses than any pagan writer before him.
Entire works were written to refute him.
Eusebius of Caesarea
In the early fourth century, he wrote Preparation for the Gospel and Demonstration of the Gospel intended as philosophical and historical weapons against Porphyry.
Eusebius openly acknowledges the scale of the challenge:
“Porphyry has written against us with no small skill.”
Eusebius, Preparation for the Gospel 1.1
Methodius of Olympus
In the late third century, he wrote a multi-volume refutation titled Against Porphyry.
The work is mostly lost.
Apollinaris of Laodicea
In the mid-fourth century, he wrote another large response to Porphyry.
Also mostly lost.
Augustine of Hippo
In the early fifth century, he addressed Porphyry multiple times in The City of God.
Augustine admits:
“Porphyry’s writings disturb many, for he was most subtle in his arguments.”
Augustine, City of God 19.22
Jerome
In the late fourth century, he quoted Porphyry’s arguments against Daniel and wrote a full-scale defense of the book as true prophecy.
The sheer number and scale of these responses show how deeply Porphyry’s arguments penetrated Christian thought.
Porphyry and the Road to the Great Persecution
Porphyry’s work did not lead to persecution by itself.
But his ideas shaped the intellectual atmosphere in which Diocletian’s Great Persecution began in AD 303.
Porphyry argued that:
Christianity rejected Rome’s ancestral customs.
Christianity undermined pagan wisdom.
Christianity destroyed images and temples.
Christianity refused to sacrifice.
Christianity misread ancient texts.
Christianity invented new doctrines.
Christianity was a danger to Roman identity.
These are the same themes echoed in Diocletian’s edicts, which demanded:
- the destruction of Christian Scriptures
- the destruction of churches
- the removal of Christians from public office
- the arrest of clergy
- and the restoration of ancestral rites
Porphyry was not a politician.
But he helped provide the philosophical justification for a state-driven attempt to suppress Christianity.
His intellectual assault and Diocletian’s political assault belong to the same moment.
The empire tried to protect its cultural inheritance and turned to force when argument failed.
Conclusion: Why Porphyry Still Matters
Porphyry’s criticisms remain the foundation of many modern skeptical arguments:
That Daniel was written after the events it “predicts.”
That the Gospels contradict one another.
That miracles do not prove divinity.
That Christians rely on faith rather than proof.
That Christian practices came from Jewish custom rather than divine mandate.
That Christianity is a late and dangerous innovation.
Porphyry was the first to articulate these critiques in a systematic way. He understood Christianity well enough to attack it where it seemed strongest.
Christianity did not survive Porphyry because his arguments were weak. It survived because its historical claims, its prophetic confidence, and its communities of endurance were stronger than any philosophical challenge.
Porphyry represents the moment when philosophy fought back with full force. And Christianity answered with its own witness, writings, and courage.
Living the Bible 