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Greek temple ruins next to Christian church illustrating Plato's philosophical influence on early Christianity and fusion of Greek and Christian thought

How Plato Accidentally Became Christianity's Philosophical Godfather

Written by: Markus Uehleke

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Published on

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Time to read 17 min

Questions Answered in This Blog Post

How did ancient Greek philosophy end up shaping Christian theology?

Why did early Church Fathers think Plato was basically an honorary Christian?

What happens when fishermen's faith meets philosophical sophistication?

The meme to start with:

Meme illustrating Plato

When Athens Crashed Jerusalem's Party


Picture this: It's the 2nd century AD, and Christianity is having a bit of an identity crisis. Started by a Jewish carpenter and spread by fishermen who could barely read, it's now facing the most sophisticated philosophical culture in human history. Greek philosophers are running around asking awkward questions about the nature of God, the soul, and reality itself, and "because the Bible says so" isn't exactly cutting it in the public square.


Enter Plato, who had been dead for about 500 years but whose ideas were having their best century ever. And somehow, despite being a pagan who lived four centuries before Christ, this ancient Greek philosopher was about to become Christianity's unlikely philosophical wingman.


How did a religion started by Galilean fishermen end up speaking fluent Platonism? Buckle up, because this is one of history's weirdest and most consequential intellectual mashups.



The Hellenistic World: Everyone's Greek Now


Here's what you need to understand: by the time Christianity showed up, the entire Mediterranean world had been marinating in Greek culture for centuries. Alexander the Great had conquered everything from Greece to India, and even though his empire fell apart faster than a cheap folding chair, Greek philosophy, language, and culture stuck around like that one houseguest who just won't leave.


Jews in the 1st century weren't living in some bubble isolated from Greek thought. They were swimming in it. They'd already translated their Hebrew Bible into Greek (the Septuagint). Jewish scholars in Alexandria were reading Plato. The Wisdom of Solomon, written in Greek and included in some versions of the Bible, shows clear Platonic influence.


So when Christianity emerged from this Jewish context, it was already swimming in philosophical waters that Plato had charted centuries earlier. The question wasn't whether Greek philosophy would influence Christianity, but how much and in what ways.



Philo: The OG Philosophical Bridge Builder


Before we get to the Christian story, we need to talk about Philo of Alexandria (30 BCE - 50 CE), a Jewish philosopher who was contemporary with Jesus and Paul. Philo loved Plato so much he called him "the most holy Plato," which is either deeply respectful or slightly blasphemous, depending on your perspective.


Philo created a sophisticated synthesis of Jewish Scripture and Greek philosophy. He argued that Moses was actually the greatest philosopher who ever lived, and that Greek philosophers like Plato had borrowed their best ideas from Hebrew sources. (This became a popular move among later Christian thinkers: "Everything good in your philosophy? Yeah, we thought of it first.")


Philo's work laid crucial groundwork. When Christian thinkers needed philosophical vocabulary to explain their faith to educated Greeks and Romans, Philo had already mapped out much of the territory. His influence on early Christianity, especially on the Gospel of John's Logos theology, can't be overstated.



Justin Martyr: Philosophy Student Turned Christian Apologist


Our first major Christian-Platonic story belongs to Justin Martyr (100-165 AD), who literally wore a philosopher's cloak and ran a philosophy school in Rome. Before becoming Christian, Justin was the ancient equivalent of that friend who keeps changing majors, sampling different philosophical schools like an intellectual buffet.


First, he tried the Stoics, but his teacher couldn't explain God satisfactorily. Then a Peripatetic philosopher, but the guy was too obsessed with his tuition fees. A Pythagorean demanded he first master music, astronomy, and geometry, which seemed like a lot of prerequisites just to talk about the meaning of life.


Finally, he found the Platonists, and it was love at first lecture. Here's Justin describing his philosophical awakening:


"The perception of immaterial things quite overpowered me, and the contemplation of ideas furnished my mind with wings, so that in a little while I supposed that I had become wise; and such was my stupidity, I expected forthwith to look upon God, for this is the end of Plato's philosophy."


Notice what happened: Platonism got him excited about immaterial reality and contemplating eternal truths. It gave him "wings." But then an old man (possibly a Syrian Christian) showed up and gently suggested that maybe the Hebrew prophets were more reliable than philosophical reasoning. Justin converted to Christianity but kept his philosopher's cloak and his Platonic training.


Here's where things get interesting: Justin didn't reject his philosophical education. Instead, he argued that Christianity was actually the superior philosophy, and that the Greek philosophers had stolen their best ideas from Moses and the Hebrew prophets. More radically, he claimed that Socrates, Plato, and other philosophers were "unknowing Christians" because they had accessed the "seed of the Logos" (divine reason) that exists in all people.


This was brilliant marketing. Justin wasn't telling educated pagans to abandon everything they'd learned. He was saying, "You know all that philosophical stuff you love? Christianity is the perfected version of that." It made Christianity intellectually respectable instead of just another weird Middle Eastern cult.



Clement of Alexandria: Christianity as True Philosophy


If Justin Martyr was dipping his toes into the Platonic-Christian synthesis, Clement of Alexandria (150-215 AD) dove in headfirst. Originally a pagan philosopher who converted to Christianity, Clement headed the famous Catechetical School in Alexandria, the intellectual powerhouse of early Christianity.


Clement had a clear mission: show educated Greeks that Christianity wasn't anti-intellectual peasant superstition but rather the highest form of philosophy. He famously argued:


"Philosophy was necessary to the Greeks for righteousness. And now it becomes conducive to piety; being a kind of preparatory training to those who attain to faith."


In Clement's view, Greek philosophy was like a kindergarten teacher getting students ready for the real education that Christianity would provide. Plato and other philosophers had glimpsed truth, but only partially. Christianity had the full picture.


Clement went so far as to portray Christ himself as a master philosopher who embodied the philosophical virtue of apatheia (freedom from passions). This led to some awkward moments, like explaining away Jesus overturning tables in the temple or weeping at Lazarus's death, because a truly wise philosopher wouldn't show such emotions.


(This is what happens when you try too hard to make religious figures fit philosophical ideals. Spoiler alert: it gets messy.)



Origen: The Most Platonic Church Father


Then came Origen of Alexandria (185-254 AD), who made Clement look like a philosophical lightweight. Origen was so brilliant that when persecution wiped out most of Alexandria's Christian leadership, he was put in charge of the catechetical school at age 18. Let that sink in: a teenager running one of early Christianity's most important intellectual institutions.


Origen eventually owned the entire corpus of Plato's works, which he bequeathed to the library at Caesarea. He may have even studied under Ammonius Saccas, the teacher of Plotinus (founder of Neoplatonism). If true, that means Christianity's most influential early theologian and paganism's most influential later philosopher had the same teacher. Talk about an interesting study group.


Origen used Platonic philosophy extensively in fighting Gnosticism and articulating Christian doctrine. Unlike Justin and Clement, who were more cautious, Origen embraced Platonic concepts with both arms. He believed the soul was "intelligible but ungenerated" (eternally existing), which other Christians found problematic.


His reputation became "both interesting and problematic to Platonists and Christians alike." That's ancient scholar-speak for "brilliant but controversial," which honestly sounds like a pretty good epitaph.



Plotinus and the Neoplatonist Revolution


While Christians were borrowing from Plato, a pagan philosopher named Plotinus (205-270 AD) was taking Plato's ideas and creating something new: Neoplatonism. Born in Egypt and possibly influenced by Christian ideas himself, Plotinus created a systematic philosophy based on Platonic principles.


His core idea: everything emanates from "The One," an ultimate, transcendent source beyond being and intellect. From The One flows Intellect (Nous), from Intellect flows Soul, and from Soul flows the material world. Reality is like a cosmic waterfall, with the highest truth at the source and everything else cascading downward.


This sounds abstract and weird until you realize: Christian theologians found this incredibly useful. It gave them vocabulary for discussing how a transcendent God relates to creation. It explained how immaterial things (like souls and angels) exist. It provided a framework for understanding evil (not as a competing force, but as privation or absence of good).


Plotinus's student Porphyry collected his teachings into the "Enneads," which would become absolutely crucial for later Christian theology, especially through one very famous convert.



Augustine: When Neoplatonism Saved Christianity


We need to talk about Augustine of Hippo (354-430 AD), because his story is basically "how reading Plotinus changed Western Christianity forever."


Young Augustine was a hot mess. Brilliant rhetorician, successful professor in Milan, but spiritually bankrupt. He'd spent nine years following Manichaeism, a Persian religion that taught a cosmic battle between equal forces of good and evil.


Philosophically, Augustine was a materialist who thought everything, including God, must be made of some kind of physical substance. He couldn't imagine how anything immaterial could exist.


Then he met Ambrose, the bishop of Milan, whose intellectual firepower matched Augustine's. Ambrose and his circle were deeply influenced by Neoplatonism, and they introduced Augustine to what he called "the books of the Platonists," likely including works of Plotinus and Porphyry, translated into Latin by Marius Victorinus.


Reading these books blew Augustine's mind. In Book 7 of his "Confessions," he describes this moment in detail. Neoplatonism taught him to "seek for immaterial truth." Suddenly, he could conceive of God as spirit rather than some rarified form of matter. He understood evil as privation of good rather than an independent force battling God for control of the universe.


Most importantly, Neoplatonism gave him vocabulary and concepts for mystical contemplation, for understanding the soul as immaterial, for thinking about God's transcendence and immanence simultaneously.


Here's Augustine's own summary:


"I found that whatever truth I had read in the Platonists was in the writings of Paul combined with the exaltation of thy grace."


Augustine famously claimed that Platonists could become Christians "by changing just a few words and opinions," a view he maintained his entire life. This is simultaneously the most generous and most controversial statement about philosophy's relationship to Christianity ever made.


Through Augustine, Neoplatonic philosophy became permanently embedded in Western Christian theology. His influence is so vast that medieval theologians like Bonaventure, Anselm, and even Thomas Aquinas (who preferred Aristotle) all built on Augustine's Platonic-Christian synthesis.


What Actually Got Borrowed: The Greatest Hits


Let's break down the specific Platonic ideas that infiltrated Christian theology:


1. The Theory of Forms Goes to Heaven

Plato believed in eternal, perfect Forms that physical objects merely imitate. A beautiful sunset imperfectly reflects the Form of Beauty. A just action imperfectly reflects the Form of Justice.


Christians loved this and basically said, "You know what? Heaven." The perfect, eternal realm of Forms became the Christian concept of Heaven as a perfect world beyond our imperfect physical reality. Earth is a shadow; Heaven is the real deal.



2. Soul-Body Dualism

Plato taught that humans are souls trapped in bodies. The soul is immortal, immaterial, and more closely connected to truth and goodness. The body is temporary, physical, and prone to error and sin.


This fit Christian beliefs about the afterlife pretty well. The immortal soul survives bodily death and faces judgment. However, Christians made a crucial modification: Plato thought disembodied existence was ideal, but Christians insisted on bodily resurrection. Paul called the disembodied state "nakedness," something shameful that awaits being "clothed" in a resurrection body.



3. The Logos Gets Personal

Both Plato and Stoic philosophy discussed the Logos (divine reason/word) as an ordering principle in the universe. The Gospel of John opens with "In the beginning was the Logos," but then makes a shocking move: "and the Logos became flesh and dwelt among us."


Justin Martyr and other Church Fathers used Logos theology to explain Christ's divine nature in terms educated Greeks could understand. Christ wasn't just a man or a god in the pagan sense; he was the divine Logos incarnate, the ordering principle of reality made flesh.



4. The Form of the Good Becomes God

Plato's Form of the Good was the highest Form from which all other Forms derived their goodness. But it was impersonal, just a principle.


Christians said, "That's basically God, except God is personal and created everything." They internalized Plato's Forms as divine ideas in God's mind. The eternal patterns weren't independent of God; they were thoughts in the divine intellect.


This solved a problem in Plato's own philosophy (he never quite reconciled his impersonal Form of Good with his Demiurge creator-god) while giving Christians sophisticated language for discussing God's nature.



5. Evil as Privation

Plotinus taught that evil isn't a separate substance or force but rather the absence or privation of good, like darkness is the absence of light. This solved massive theological problems.


If God created everything and God is good, how does evil exist? Answer: Evil doesn't exist as a thing God created. It's what happens when good is absent or diminished. Augustine adopted this wholesale, and it became standard Christian teaching on evil.



The Downside: When Philosophy Gets Too Comfortable


Not everyone was thrilled about Christianity's philosophical makeover. The concerns, both ancient and modern, are worth taking seriously:


The Trinity Gets Complicated

Critics point out that the doctrine of the Trinity, with its language of "substance," "essence," "persons," and "hypostases," is heavily shaped by Greek philosophical categories. The New Testament doesn't include these terms or formulate the Trinity in these ways. The doctrine took three to four centuries to develop, largely through debates conducted in philosophical vocabulary.


Baptist theologian William N. Clarke noted that the Trinity doctrine "differed widely from the simplicity of the early faith." Some scholars argue this represents the "Hellenization" of a simpler biblical message.



Salvation Becomes Contemplation

Neoplatonism emphasized the soul's ascent back to the divine source through contemplation and purification. Some early Christian theology adopted this framework, potentially minimizing the role of Christ's work and making salvation about philosophical enlightenment rather than grace through faith.


Augustine's emphasis on the "beatific vision" (seeing God face-to-face as ultimate happiness) comes straight from Neoplatonic mysticism. While beautiful, it arguably shifts focus from Christ's saving work to the individual's contemplative achievement.



Material World Gets Demoted

Plato had a low view of the physical world, seeing it as a pale shadow of true reality. This created tension with the biblical view that creation is good, that God became incarnate in flesh, and that believers await bodily resurrection, not escape from physicality.


Some Christian thinkers absorbed Platonic disdain for matter, leading to extreme asceticism and devaluation of the body, marriage, and physical existence generally.



God Becomes Abstract

Plato's Form of the Good and Plotinus's One are impersonal, abstract principles. The biblical God is intensely personal, relational, and active in history. There's tension between these conceptions.


When Christian theology emphasizes God's eternality, immutability, and transcendence using Neoplatonic categories, it can obscure the biblical picture of a God who walks with Adam, wrestles with Jacob, and weeps over Jerusalem.



The Million Dollar Question: Friend or Foe?


So was Plato's influence on Christianity a good thing or a corruption? Modern scholars are split, and the debate hasn't cooled down in 1,700 years.


Team Positive:

Plato gave Christianity intellectual respectability and vocabulary for sophisticated theology. Without Platonic philosophy, Christianity might have remained an obscure Jewish sect. The Church Fathers used philosophical tools to articulate doctrines that distinguished Christianity from competing religions and heresies. The faith-reason partnership that Plato enabled allowed Christianity to engage culture at the highest intellectual level.


As Dean Inge, famous professor of divinity, put it: "Platonism is part of the vital structure of Christian theology. The utter impossibility of excising Platonism from Christianity without tearing Christianity to pieces."



Team Negative:

Plato corrupted a simpler biblical message with pagan philosophy. The early Christians were humble fishermen with direct experience of Jesus. The later Church Fathers were sophisticated philosophers more interested in Greek speculation than biblical teaching. Doctrines like the Trinity aren't biblical; they're philosophical constructs imposed on Scripture.



Team Nuanced (where most scholars land):

Christianity originated as 1st century Jewish messianism, not Greek philosophy. Jesus was a Jewish rabbi and Messiah, not a philosopher. However, as Christianity spread into the Greco-Roman world, it needed philosophical vocabulary to communicate with that culture. The Church Fathers modified and baptized Platonic concepts rather than simply adopting them wholesale. Some influences were positive, others problematic. We need to carefully distinguish biblical from philosophical elements without pretending we can completely separate them.



What Actually Happened: A Historical Reality Check


Here's what we can say with confidence:


Christianity did not originate from Platonism. It started as a form of Jewish messianism in 1st century Palestine, rooted in Hebrew Scripture and centered on Jesus as the long-awaited Messiah. Peter, James, and John weren't quoting Plato; they were living out what they'd experienced with Jesus.


But as Christianity exploded beyond its Jewish context into the wider Greco-Roman world, philosophical questions became unavoidable. How does one God exist as Father, Son, and Spirit? How can Jesus be fully divine and fully human? What's the relationship between faith and reason? How do we defend Christianity against sophisticated pagan philosophers?


The Church Fathers reached for the best intellectual tools available: Greek philosophy, especially Platonic philosophy, which had already been partially Judaized through thinkers like Philo.


They didn't just copy-paste Plato into Christianity. They argued, modified, rejected, and adapted. Justin Martyr used Logos theology but insisted Christ's incarnation was something no philosopher anticipated. Clement saw philosophy as preparation but insisted Christianity surpassed it. Augustine found Neoplatonism helpful but noted crucial differences: the Incarnation, grace, and the personal nature of God weren't in Plotinus.



The Gnostic Warning: When Platonic Influence Goes Wrong


We should mention Gnosticism, which shows what happens when Platonic influence goes too far in the wrong direction.


Gnostics took Plato's world of Forms and his Demiurge creator-god and ran in a wild direction. They identified the Form of Good as the true, ultimate God and the Demiurge as an evil or incompetent lesser god who created the terrible physical world. Salvation meant escaping the material prison through secret knowledge (gnosis).


The Church Fathers, including our Plato-loving friends, fought vigorously against this interpretation. Plotinus himself wrote an entire treatise "Against the Gnostics," defending Plato's Demiurge as good and rejecting the vilification of creation.


This shows something important: the issue wasn't whether to engage with Plato, but how to do it responsibly without distorting Christianity beyond recognition.



The Legacy: We're All Platonists Now (Sort Of)


Whether you like it or not, if you're part of a traditional Christian church, you're swimming in Platonic influence:


When you talk about your "immortal soul," that's Plato-influenced language. When you think of Heaven as a perfect realm beyond this imperfect world, you're channeling Platonic Forms. When you discuss the Trinity using words like "essence" and "substance," you're using Greek philosophical vocabulary. When you contemplate God's perfection, immutability, and transcendence, you're working with concepts shaped by Neoplatonism.


Even C.S. Lewis, beloved by modern Christians, was heavily influenced by Plato and is often described as a Christian Platonist. His descriptions of Heaven in "The Last Battle" (the real Narnia being more real than the shadow-Narnia) are straight out of Plato's Theory of Forms. His concept of "patches of Godlight" in our world? Platonic.


The influence runs so deep that trying to separate "pure biblical Christianity" from "Greek philosophical Christianity" is like trying to un-mix a cake. You can theoretically identify the flour, eggs, and sugar, but good luck getting them back into separate containers.



So What Do We Do With This?


Three options present themselves:


Option 1: Embrace It

Acknowledge that Christianity has always been a synthesis, engaging the best intellectual tools of each culture it enters. Plato's influence was part of God's providence, preparing the intellectual ground for the Gospel. The Church Fathers were wise to use philosophical vocabulary, and we're richer for it.


Option 2: Reject It

Try to strip away all philosophical accretions and return to "pure" biblical Christianity. This is harder than it sounds (good luck explaining the Trinity without philosophical categories), but some Christians attempt it.


Option 3: Navigate It Carefully

Recognize both the value and the problems of Platonic influence. Keep what's helpful and biblically sound, critique what's not. Use philosophical tools while remaining primarily committed to Scripture and the person of Jesus Christ rather than philosophical systems.


Most theologians across church traditions land somewhere in Option 3, though they disagree vigorously about where to draw the lines.



The Takeaway


Plato's influence on Christianity is one of history's most consequential intellectual encounters. A pagan philosopher who died four centuries before Christ became one of the most important shapers of Christian theology, providing vocabulary, concepts, and frameworks that Christians still use today.


Was it divine providence or philosophical corruption? Necessary adaptation or dangerous compromise? Brilliant synthesis or tragic confusion?


The answer is probably: all of the above, depending on which specific influence you're examining.


What's undeniable is this: you can't understand Christian theology, especially classical formulations about God, Trinity, soul, and salvation, without understanding Plato's influence. For better or worse, in sickness and health, till the eschaton do us part, Christianity and Platonism are married.


Dean Inge was right: trying to remove Platonism from Christianity would tear Christianity to pieces. Whether that's because Platonic influence is genuinely helpful or because the damage is too deep to fix is a question Christians will probably debate until Jesus returns.


And maybe, just maybe, when he does, someone will ask him what he thinks about Plato. That would be a conversation worth recording.

Summary:

Plato's philosophy profoundly influenced early Christian theology through multiple channels including Hellenistic Judaism and Church Fathers

Justin Martyr, Clement of Alexandria, and Origen used Platonic concepts to defend and articulate Christianity to educated pagans

Augustine's conversion and theological framework were directly enabled by reading Neoplatonist philosophers Plotinus and Porphyry

Platonic ideas like Theory of Forms, soul-body dualism, and Logos theology became foundational to Christian doctrine

The influence provided intellectual respectability but raised ongoing debates about whether it enhanced or corrupted biblical faith


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