If you had asked a Christian in AD 300 what they wanted most from the Roman government, the answer would have been simple.
Leave us alone.
Stop imprisoning our leaders. Stop burning our Scriptures. Stop destroying our churches. But within a single generation, that prayer was answered in a way no one had fully imagined.
By AD 324, Constantine ruled the entire Roman Empire. Christianity was no longer illegal. It was protected. It was even favored.
And that is where things get interesting. Because not every Christian looked at that moment and said, “This is exactly what we hoped for.”
Some did. And they said it very clearly. Others stepped back, or walked away, or even warned that something dangerous was happening.
So the question we need to ask is not just what changed politically. It is this. What did Christians think about that change?
Lactantius: “God Has Struck Them Down”
Let’s start with someone who clearly saw this moment as a victory.
Lactantius is not writing from a distance. He ends up inside the imperial world itself, serving as tutor to Constantine’s son Crispus around AD 317.
So when he looks at what just happened, he is not guessing. He is living in the middle of it.
And here is how he interprets the fall of the persecuting emperors:
“God has struck down all those who persecuted His name, so that neither their names nor their race remain.”
(Lactantius, On the Deaths of the Persecutors 1.1, written c. AD 313–315)
That is not cautious language. He then walks through specific emperors. When he describes the death of Galerius, he does not soften it:
“A sore arose in the lower part of his body, which spread and penetrated to the vitals… worms swarmed in his bowels… the smell was intolerable.”
(On the Deaths of the Persecutors 33.6–7, c. AD 313–315)
And when he describes the defeat of Maxentius:
“The bridge broke… and he was carried down by the weight of his armor and drowned in the river.”
(On the Deaths of the Persecutors 44.9, c. AD 313–315)
So what is he saying? He is saying that what just happened in the Roman world is not random. God judged the persecutors. And now, from where Lactantius is sitting inside the imperial household, the conclusion feels obvious.
The empire has changed because God has acted.
Eusebius of Caesarea: “A King Beloved of God”
Now let’s take a step further.
If Lactantius sees judgment, Eusebius sees something even bigger. He is a bishop. He is at the Council of Nicaea in AD 325. He interacts with Constantine personally. He is not on the outside looking in.
And listen to how he talks about Constantine:
“He alone of all those who ever wielded the Roman power was the friend of God… a king beloved of God.”
(Eusebius, Life of Constantine 1.3, written c. AD 335–337)
That is a massive statement.
And then this:
“He governed the world in imitation of God.”
(Life of Constantine 1.2, written c. AD 335–337)
And looking back on the end of persecution:
“Thus, when the impious rulers had been removed, the power of God shone forth… and the whole human race was freed from the oppression of tyrants.”
(Eusebius, Ecclesiastical History 10.9.1, written c. AD 323–325)
So now the claim has grown. It is no longer just that God judged the persecutors. It is that the emperor himself is participating in God’s rule.
Now pause and think about that. For generations, Christians had viewed emperors as threats. Now one of their leading historians is describing the emperor as reflecting God.
That shift is enormous. And it makes sense when you remember where Eusebius is standing. He is close to power. He is seeing Christianity protected, honored, and elevated. From that position, it feels like fulfillment.
Hilary of Poitiers: “The Church Dishonors Christ by Trusting Kings”
Now let’s turn the corner. Because not everyone is standing where Lactantius and Eusebius are standing.
Hilary of Poitiers is a bishop in Gaul. And he ends up in direct conflict with Constantius II, Constantine’s son.
Constantius is not persecuting Christians in the old sense. He is doing something new. He is using imperial power to influence theology, to pressure bishops, and to enforce positions.
Hilary refuses. And around AD 356, he is exiled.
So now listen to him. Not as a theorist, but as someone living this.
“The Church seeks for secular support, and in so doing dishonors Christ by trusting in the protection of kings.”
(Hilary of Poitiers, Ad Constantium Augustum 6, written c. AD 356–360)
That line alone tells you everything has shifted. The problem is no longer just persecution. It is dependence.
And then comes the line that we needed to slow down and really understand:
“She who once conquered the world by enduring suffering now complains that she is persecuted by the rulers of the world.”
(Ad Constantium Augustum 6, c. AD 356–360)
Let me say that in plain language so it lands. Hilary is saying:
There was a time when the Church overcame the Roman world by enduring suffering without relying on political power. That was how it grew. That was how it spread.
Now the Church has learned to rely on rulers. It expects protection. And because it expects that protection, it reacts differently when rulers interfere.
And here is the key. The rulers are now Christian. So the Church is no longer clearly outside the system. It is inside it. And that means the same power that protects the Church can now control it.
Hilary is not confused. He is warning.
Anthony the Great: “He Departed Into the Desert”
Now instead of arguing, some Christians do something else entirely. They leave.
Anthony becomes the most famous example, and we know his life through Athanasius of Alexandria, writing around AD 356.
“He departed into the desert… and devoted himself to the ascetic life.”
(Athanasius, Life of Anthony 3, written c. AD 356)
But the reason matters:
“He saw that many were being drawn into the love of money and the cares of life.”
(Life of Anthony 12, written c. AD 356)
Do you see what’s happening? This is not persecution. This is comfort. This is a Church settling into society. And Anthony looks at that and says, this is dangerous.
And then this line:
“The desert was made a city by monks, who left their own people and registered themselves for the citizenship in heaven.”
(Life of Anthony 14, written c. AD 356)
That is a direct alternative. If the empire is becoming Christian, Anthony builds something outside it.
The Desert Fathers: “Flee From Men”
Now listen to the monks themselves.
From Arsenius, who had served in the imperial court:
“Flee from men and you will be saved.”
(Sayings of the Desert Fathers, Arsenius 1, 4th–5th century tradition)
He knew power. He walked away from it.
And then:
“Often I have spoken and regretted it; but I have never been silent and regretted it.”
(Sayings of the Desert Fathers, Arsenius 5)
And from Moses:
“If you wish to be saved, become as one dead to this world.”
(Sayings of the Desert Fathers, Moses 11, 4th century tradition)
That is not moderation. That is total separation.
Pachomius: Building a Different World
Now here is where this movement becomes even more important.
Pachomius does not just leave society. He builds something else. He was born around AD 292 and had contact with the Roman system through military conscription. He knew structure, authority, and organized life.
And what does he build? Communities that look nothing like the ambition-driven world around them.
In his rule, we see the mindset clearly.
“Do not seek to be known by men, but by God.”
(Rule of Pachomius, early 4th century)
And this is not just about humility. It is about rejecting a whole way of thinking. Because in the world around him, Christianity is becoming visible, honored, and socially advantageous. Pachomius builds communities where none of that matters. Where recognition is a problem, not a goal. Where advancement is not the point. Where identity is not tied to public life at all.
The monastery becomes an alternative society. Not against the empire in a political sense. But completely uninterested in what the empire offers.
The Scale of the Movement: Thousands Leaving Society
At this point, it is important to pause and realize what we are actually looking at. This is not a handful of extreme individuals choosing a more disciplined life.
This is a movement that spreads across regions, fills entire deserts, and reshapes the social landscape of Christianity within a century. And the sources are remarkably consistent in describing just how large it became.
We can start in the mid fourth century with Athanasius of Alexandria, who is writing close to the beginning of the movement’s expansion. In describing the impact of Anthony the Great, he says:
“And so from that time the monasteries began to appear in the mountains, and the desert was populated by monks, who left their own people and registered themselves for the citizenship in heaven.”
(Athanasius, Life of Anthony 14, written c. AD 356)
That line is already describing growth, not beginnings. The desert is no longer empty. It is becoming populated. By the late fourth century, the language becomes even stronger. Jerome reflects on what he sees in his own day:
“What Egypt once was for the philosophers, that it has now become for the monks.”
(Jerome, Letter 22.34, written c. AD 384)
Jerome is making a historical comparison. There was a time when Egypt was known for its philosophical schools. Now it is known for its monks. The intellectual centers of the past have been replaced by ascetic communities. He reinforces the same point elsewhere:
“How many there are in the desert, who day and night serve God.”
(Jerome, Letter 125.7, written c. AD 412)
He does not give a number there, but the emphasis is clear. The desert is full. Around the same period, Rufinus of Aquileia describes the transformation in even more striking terms:
“The desert had been made a city by the multitude of monks.”
(Rufinus, Ecclesiastical History 2.8, written c. AD 402–410)
That is not casual language. A desert is, by definition, empty. Rufinus is saying it now functions like a city because of the sheer number of people living there. By the early fifth century, we begin to get more specific numbers from Palladius of Galatia, who traveled through these regions and reports what he saw:
“In the Thebaid there are many monasteries… some containing two thousand, some three thousand monks.”
(Palladius, Lausiac History 7, written c. AD 419–420)
And even more precisely:
“In Nitria alone there are about five thousand men living in cells.”
(Palladius, Lausiac History 7, written c. AD 419–420)
Five thousand in one region. Thousands in individual communities. At that point, we are no longer dealing with isolated experiments in ascetic life. We are looking at one of the largest organized movements within Christianity.
And when you step back and place these sources in order, the development becomes clear.
Athanasius, writing in the mid 300s, describes the desert beginning to fill with monks. Jerome and Rufinus, writing a few decades later, describe a landscape already transformed. Palladius, writing in the early 400s, gives numbers that confirm just how extensive that transformation had become.
These are not later legends being projected backward. They are descriptions of a movement that began in the generation after Constantine and grew rapidly into a defining feature of Christian life.
Which brings us back to the central question of this entire discussion.
Why did so many Christians leave society at precisely the moment when society had finally become favorable to them?
That is not a coincidence. It is a response.
Conclusion
So now you can see the divide clearly.
Lactantius looks at the empire and says, God has judged the persecutors. Eusebius looks at the emperor and says, he reflects the rule of God.
Hilary looks at the Church and says, it is becoming dependent on power. Anthony walks away. The desert fathers reject society. Pachomius builds something entirely separate. And all of this is happening at the same time.
So is Christianity safe when favored by government?
The early Church did not give one answer. It gave two. And that tension has never gone away.
Living the Bible 