Ambrose and the Courage to Resist the State

On rare occasions, leaders arise in history who possess the vision and capability to effectively address several significant problems at once, often leaving a lasting impact on their societies. In the late fourth century, that exceptional leader was Ambrose of Milan, Italy (340-397 AD). As Bishop of Milan, he was not only a powerful orator but also a devoted theologian whose influence reached far beyond his time. Substantial challenges were confronting the movement of God’s Story of Grace, including political strife, theological disputes, and moral decline in the church, which Ambrose navigated with remarkable skill. He actively worked to bridge the gap between church and state, advocating for Christian values while confronting the powerful rulers of his day, thereby shaping the early Christian church’s influence within the Roman Empire.

The church was divided and weakened by the heresy of Arianism.
The power and authority of state rulers over the church had become way too great.
There were no larger voices to shape a biblical understanding to address the great shifts of the changing times.

All of these factors combined, placed the church at a place of increased impotency. In Ambrose, an unlikely and reluctant bishop in northern Italy, these problems would find a decisive answer. In God’s Story of Grace, he would arise to the occasion and weave together several loose threads into a unified knot. Further, he would ascend to a place of influence–not from his own choosing or ambition–to showcase the supremacy of Christ in the world:

God has put all things under the authority of Christ and has made him head over all things for the benefit of the church. (Ephesians 1:22)

In this article we will see how the life of Ambrose, in his spiritual authority, restrained the most powerful state in the world, showing the supremacy of Christ for his church over all things.

Life of Ambrose

Summoned to Lead

Ambrose, born in 340 AD, was the son of a government official in Trier, a city in present-day Germany. Following in his father’s footsteps he trained as a lawyer to prepare himself for a life of service as a government official. By his early 30s, he was already governor of Milan, a city in northern Italy. Milan had taken over Rome as the place of imperial rule due to the emergence of barbarian invaders threatening the capital city. When the bishop of Milan died in 374 AD, Ambrose expected trouble. Tension between the Nicene (those holding to the divinity of Jesus) and Arian (those holding to Jesus being less than divinity) parties were very sharp. Conflict arose over whether the new bishop would be Arian or Nicene.

As it was coming time to choose a bishop, crowds surged into the streets, some shouting they wanted an Arian bishop, while others demanded a Nicene replacement. The animosities were potentially boiling to a riot. As regional governor, it was Ambrose’s responsibility to oversee the election. He pleaded with the crowd to keep the peace. He was not publicly identified with either party. As he addressed the riotous crowds, the people were enthralled with his speaking ability. Combined with his existing popularity, the crowd began to shout, “Ambrose for bishop!” The pleas grew more insistent: “Ambrose for bishop! Ambrose for bishop!”

The two major problems with this appeal is that Ambrose had no desire to be bishop; further, he had not even been baptized. After strongly resisting the call to spiritual leadership over Milan, he finally consented to the will of the citizens. Within eight days, Ambrose was baptized and ordained bishop of Milan. As a leader he was both wise and humble enough to know how much he had to learn. When he became bishop, he gave away his wealth and found teachers in theology to help him learn what he needed to know to effectively shepherd and guide as bishop. He eventually became one of the most learned men of his time. His influence would be felt for centuries.

Overcoming the Power of Arianism

Upon attaining the role of bishop, he was not publicly aligned with either Nicene or Arian views. This worked to his favor because both parties believed that they had obtained a mutually acceptable candidate in Ambrose. As he grew in spiritual leadership and applied his education to the interpretation and exposition of scripture; he acquired a profoundly biblical and Nicene understanding of the faith. It would be this doctrine that he zealously defended in the face of Arian opposition not only against Arian bishops but from the imperial power of the Rome. Emperor Valentinian II, who was Arian, attempted to have one of the three major churches in Milan under the control of the Arians for their use. Ambrose refused. The conflict culminated in a stand-off between imperial and church authority. Ambrose and his supporters barricaded themselves inside the church successfully resisting the efforts of Valentinian.

During the confrontation Ambrose set forth an important principle that would have ramifications for Church-state relations for centuries: “The emperor is in the church, not above it.” In 381, the same year as the Council of Constantinople, Ambrose presided over the Council of Aquileia in the West. This council deposed several Arian bishops, solidifying support for Nicene and biblical belief in his own realm.

“The emperor is in the church, not above it.”
Ambrose of Milan

Overcoming the Pride of Rome

Ambrose’s triumph over a politically powerful Arianism was followed by a more thorny confrontation with another imperial authority who arose to the throne in 380, Theodosius. Not long after he became emperor, Theodosius declared Nicene Christianity the official belief of the entire Roman Empire. Yet Ambrose’s principle of the emperor being “in the church, not above it” would face an even greater test with this new ruler. This happened when Theodosius ordered the massacre of some 7,000 people in Thessalonica after a local riot that claimed the lives of several imperial officers. Ambrose, as the emperor’s bishop, ordered him to do public penance. In a carefully worded but firm letter, he chided the emperor, likening his action to King David’s murder of Uriah the Hittite:

Bear it, then, with patience, O Emperor, if it be said to you: You have done that which was spoken of to King David by the prophet. For if you listen obediently to this, and say, “I have sinned against the Lord,” if you repeat those words of the royal prophet: “O come let us worship and fall down before Him, and mourn before the Lord our God, Who made us,” it shall be said to you also: “Since you repent, the Lord puts away your sin, and you shall not die.”

Theodosius complied with this directive and publicly repented and decreed that, going forward, any time he sentenced someone to death, there should be a waiting period of a month before the sentence was carried out. This way he would not act in haste.

Ambrose’s Legacy

Ambrose was used in God’s Story of Grace to place the church on a footing of moral authority in order that Christianity and the gospel could give spiritual guidance to the larger development of civilization. He did this by bravely and effectively resisting two emperors, demonstrating a remarkable blend of spiritual fortitude and diplomatic skill, and placing the church at its proper place of authority. This courageous stance was not merely an act of defiance but a profound assertion that would allow the church to become a moral compass and conscience of the state, particularly as western Rome began a gradual process of disintegration marked by political turmoil and societal upheaval. In this context, the church would rise to take the lead as the unifying energy of civilization, fostering a sense of community and shared purpose among disparate groups. As God is shaping the world after his trinitarian image, Ambrose’s stance and resistance would create greater humility in the state (after the one God), prompting rulers to recognize the limits of their power. This acknowledgment would allow greater freedom and creativity for society (after the distinctive persons), encouraging a flourishing of culture, art, and thought, rooted in Christian values. Ambrose’s enduring influence would echo through history, reminding future generations of the vital interplay between faith and governance in the pursuit of a just and equitable society.

This would also pave the way for the contributions of Ambrose’s greatest disciple, Augustine. It would be Augustine who would provide a monumental understanding of the role and limits of the state in relation to church, especially in his magisterial writing, The City of God. It would be through the leadership of Ambrose, and to a much greater extent, Augustine, that the church and society would find a way to understand its place, as the Rome of the West would become increasingly weakened by barbarian invasions it was not able to stop.

Why Constantine Was Good For Christianity (Hosea 6:6)

Two rivals, Constantine and Maxentius, met in an earth-shaking confrontation at the Milvian Bridge, north of Rome, over the Tiber River. Maxentius held Rome in his iron grip. As Constantine descended from the north, this brilliant general marched his smaller, battle-hardened army toward Rome. The day before the final battle, Constantine was filled with a familiar anxiety. At midday, his gaze drifted upward, away from the turmoil of his camp. There, he saw a cross of light above the sun itself, with the Greek words “Ἐν Τούτῳ Νίκα” (“In this sign, conquer”) emblazoned upon it. Later that night, another vision came to him in a dream. Christ appeared, bearing the same cross, and commanded Constantine to make this symbol his standard in battle. The symbol was the Chi-Rho, an elegant monogram formed from the first two Greek letters of “Christ.” The next day, he ordered his soldiers to paint the sacred monogram on their shields. Within hours, the two armies clashed fiercely on the plain north of Rome. Constantine’s cavalry, emblazoned with the Chi-Rho, charged with a ferocity that Maxentius’s larger army could not match. It was a decisive victory. After his victory at the Milvian Bridge, what Constantine did next—or did not do—would begin to echo through the ages. The rules of the triumph required Constantine to enter the Roman capital and offer the sacrifice of an animal to Jupiter; Constantine refused. This was because he attributed his win to the Christian God.

Constantine became the first Roman emperor to embrace and then promote Christianity. To some, this royal acceptance is what led to a corruption and decline of biblical Christianity for the centuries ahead. The worldly priorities of state power overtook the founding mission to make disciples given by Jesus (Matthew 28:19). so it is claimed. But what if Constantine had not become favorable to Christianity? Would the church have been stronger as a persecuted and minority faith? The answer is probably not. From the angle of God’s Story of Grace, Constantine was part of a kairos (“fullness of time moment”) that brought a pivotal change: he shifted the dominant religious theme of Rome from the pervasively practiced pagan blood sacrifice to a civic acknowledgment of the completed blood sacrifice of Christ. For all of Constantine’s alleged blessings and flaws, this exchange brought a pivotal shift in Western civilization.

In this article, the claim will be made that the effects of the atonement of Christ, which began to be embraced by the Roman Empire, liberated society from the fear of appeasing angry and volatile deities to providing increasing mercy to increase compassion in society. This would be a turning point for the widespread improvement of civilization reflecting the mutual and self-giving love of the Trinity.

Bloody Rome

The core of Rome’s existence was built on sacrifice. These frequently included animal offerings like rams and ox; but also human slaughter through gladiatorial games, strangling prisoners at the temple, burying prisoners of war alive, among others atrocities. Sacrifices were central to establishing favor with the deities in order to appease them for transgressions or demonstrate devotion to gain their favor. Another way this sacrificial devotion was expressed was the killing of Christians. This occurred at its greatest extent from 303 to 311, just before Constantine ascended to the throne in 312. Diocletian became emperor in 284. In 299, he participated in a sacrifice to seek the favor of the Roman Empire, while in the city of Antioch, that proved alarming. When the liver of a slaughtered animal was examined, the pagan priest said it showed unfavorable signs. For Diocletian this was very disturbing. The very peace of Rome was at stake. Theologian Peter Leithart describes what happens next:

The presiding diviner investigated and concluded that “profane persons” had interrupted the rites, and attention focused on Christians in Diocletian’s court who had made the sign of the cross to ward off demons during the proceedings. Diocletian was outraged and demanded that all members of his court offer sacrifice, a test designed to weed out Christians. Soldiers were required to sacrifice or leave the sacred Roman army. At least at the heart of the empire, in the court and in the army, sacrifices would continue without being polluted by Christians. At the heart of the empire, where it really mattered, gods and men would remain in communion.

Still the problem was not solved. Leithart continues:

Several years after the failed sacrifice, Diocletian was back in Antioch when a Christian deacon, Romanus, burst in on another imperial sacrifice loudly denouncing the worship of demons. Diocletian ordered that his tongue be cut out and sentenced him to prison, where he was executed, but the emperor knew something more needed to be done. Wintering in Nicomedia the following year, Diocletian consulted with his Caesar Galerius about the problem. “Arrogant and ambitious” and a “fanatical pagan,” Galerius urged Diocletian to issue a general order against the Christians.

Diocletian was charged with guarding the frontiers of the empire and maintaining the sacredness of Rome. It was his solemn duty to expel any pollution that might infect it and bring down the wrath of the gods. Christianity was spreading, and Christians were everywhere. From Diocletian’s point of view, Rome could only be saved by a massive sacrifice of Christian blood. What started out in 303 as an arrest and violence against Christian leaders turned into a bloodshed in the most widespread, long lasting and severe persecution which the church had ever faced under the hammer of Rome. The beginning of the end would finally occur at the battle at the Milvian Bridge in 312 and one year later the blood sacrifice of Christians ended in 313 when Constantine issued the Edict of Milan. This gave Christians legal status to practice their faith.

This was the beginning of a series of reforms which would baptize the Roman Empire in a Christian direction away from paganism. He prohibited his provincial governors from offering sacrifices at official functions, thus opening up civil offices to Christians. Eusebius, the ancient historian, claimed Constantine passed a law around 324 that “was intended to restrain the idolatrous abominations which in times past had been practiced in every city and country; and it provided that no one should erect images, or practice divination and other false and foolish arts, or offer sacrifices in any way.” In 325, he issued an edict against the gladiatorial games declaring that “bloody spectacles are not suitable for civil ease and domestic quiet.” Constantine himself fought imperial wars, but his victories were not celebrated as the honor-wars to the gods of previous emperors had done.

With Constantine, the Roman Empire became officially an empire without sacrifice or at least a bloody sacrifice. It still had acknowledgement of sacrifice, but it was the sacrifice provided once and for all by Jesus Christ. The implications had earth-quaking significance. Again, Peter Leithart explains:

Every city is sacrificial, but Constantine eliminated sacrifice in his own city and welcomed a different sacrificial city into Rome. For a fourth-century Roman, eliminating sacrifice from the city was as much as to say, “My city is no longer a city.” For a fourth-century Roman, acknowledging the church’s bloodless sacrifice as the sacrifice was as much as to say, “The church is the true city here.” When Constantine began to end sacrifice, he began to end Rome as he knew it, for he initiated the end of Rome’s sacrificial lifeblood and established that Rome’s life now depended on its adherence to another civic center, the church.

Because Rome couldn’t acknowledge the ultimate and final sacrifice for humanity, it was not free to exercise mercy. Above all God desires from his people “mercy not sacrifice.” (Hosea 6:6)

Pagan Sacrifice to the Sacrifice of Christ

The state became more compassionate. Because the sacrifice of Christ was accomplished “once and for all,” Rome no longer needed to be consumed with the brutal work of appeasing bloodthirsty entities. Rather, it could promote compassion and mercy as expressed through the message of the church. This would, in turn, bring the promotion of more just laws.

Crucifixion was abolished.
Funding for the poor, orphans, and widows was introduced.
The practice of infanticide through exposing unwanted babies was made illegal. Care for unwanted children was provided for from the public treasury.
More humane policies toward slaves was put in place.
Branding on the faces of criminals was made illegal.
Prison reform was inaugurated requiring that prisoners be given daylight and fresh air instead of being kept in total darkness.
Gladiator games were banned.
Women were given more rights in regard to their children.
A day of rest was put in place , thereby reordering the life of society to make space for Christian worship.¹

The mission of the church expanded. The Constantinian revolution created space for Christianity to shape the new society that was being constructed away from paganism. The church put forward a new idea of a separate community within society. No longer did the state control the ultimate meaning of life. The church was a gathered community within the state that brought in God’s Story of Grace in Jesus Christ. The result was a great flowering of Christian expression in art, architecture, law, theology, philosophy, and spiritual literature. None of this was imposed by the state but came as a natural outgrowth of the dynamic movement of Christianity. The number of disciples would mount across the empire. Historian Robert Louis Wilken describes the church’s growth:

The transformation that took place within the empire would be replicated again and again as Christianity spread beyond Rome’s boundaries into northern Europe, among the Franks and the Germans, the British and the Irish, the Scandinavians and the Poles, the Lithuanians and the Bulgars, the Ukrainians and the Russians, into Asia among the Armenians and Georgians, and into Africa among the Nubians and Ethiopians. For all these peoples conversion to Christianity meant a change of public practice in law, in architecture, in calendar, in marriage customs, in political institutions, in social mores, in burial practices, and much more.

Statistically, it would be at the time of Constantine that Christianity would experience an exponential growth.²

Conclusion

In Constantine, God’s Story of Grace would advance primarily with the cross triumphing over paganism, and compassion beginning to overtake the Roman jaws of power. The Christian ethic of human value would advance as a widespread value in Western culture. It would be from this place that the boundaries of Christian mission and influence would be expanded. For the first time, the organic movement of the church would intersect with the force of Roman power, and a new phase of the image of the Trinity would be born into the world. All the parts of Rome (the many) would become more unified as a larger body (the one) under the sign of the cross.³

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Though Constantine would have a revolutionary influence, he did not usher in a “golden age” of Christianity. Over the next decades after Constantine, Christianity would face a battle against Arianism to affirm the deity of Christ as affirmed in the Council of Nicaea. Often those like Athanasius, who affirmed the Nicaean Creed were severely persecuted.
Rodney Stark has provided these stats on the growth of Christianity in the first four centuries: 7,500 Christians by the end of the first century (0.02% of sixty million people); 40,000 Christians by 150 AD (0.07%); 200,000 by 200 AD (0.35%); 2 million by 250 AD (2%)6 million by 300 AD (10%); 34 million by 350 AD (57%)
Under Constantine, the church held its first ecumenical council, which affirmed the doctrine of the deity of Christ at the Nicaean Council in 325.

Constantine and the Council of Nicaea: The Moment Christianity Was Defined

In an age riven by online outrage, culture-war politics, and anxious questions like, “Who is God in a chaotic modern life?”, picture an unexpected scene: a Roman emperor stepping onto history’s stage to heal a fractured church. That is Constantine the Great in AD 325, summoning bishops from across the empire to the city of Nicaea. Their mission was not to win a theological shouting match, but to clarify who Jesus really is—and, through that, to open a path for God’s grace to mend division, form a new kind of community, and offer genuine freedom. As we wrestle today with loneliness, suspicion, and spiritual doubt, the story of Nicaea shows how embracing the Trinity’s unity can restore dignity, belonging, and purpose in broken lives. Step into this ancient drama, and you will find that its questions about faith, unity, and identity are still your questions.

“Division in the church is worse than war.” — Constantine, urging harmony at Nicaea.

Quick Facts on Constantine

Born: AD 272 in Naissus (modern Serbia)
Key Victory: Battle of Milvian Bridge, AD 312
Legacy: First Christian emperor, builder of unity

Constantine’s Rise: From Battlefield to Faith

Our story begins in the rough-and-tumble world of late imperial Rome. Constantine, born in AD 272, grew up amid court intrigues as the son of Constantius, a senior military commander, and learned early how fragile power could be. In AD 306, after his father’s death, his troops proclaimed him emperor in the West, drawing him into a series of civil wars that would shape the fate of the empire.

Everything changed at the Milvian Bridge in AD 312. Eusebius of Caesarea recounts that before the battle, Constantine saw a sign of the cross in the sky, which he interpreted as a divine call to trust in the Christian God. He won decisively, attributed his victory to Christ, and issued the Edict of Milan in AD 313 with Licinius, granting legal toleration to Christians and ending state-sponsored persecution in the West. By AD 324, Constantine emerged as the sole ruler after defeating Licinius, describing himself as a “bishop” overseeing the church’s civic concerns. This shift—from warrior emperor to guardian of the church—prepared the way for Nicaea, where imperial power would support the church rather than crush it.

In this sign, conquer.” — The vision that changed Constantine’s path.

The Roman Empire of Constantine’s day stretched across Europe, North Africa, and the Near East, weaving together a tapestry of languages, cultures, and religions. Recent persecutions under Diocletian (AD 303–311) had left deep scars, especially in the East, but Constantine reversed course, favoring Christians and allowing the church to come out of the catacombs and into public life.

The Controversy: Arius vs. Alexander

Fast-forward to Alexandria around AD 318. In this cosmopolitan port city, a conflict erupts between Bishop Alexander and a presbyter named Arius. Arius, a gifted and charismatic preacher, taught that the Son of God was exalted above all creatures yet still a creature, not eternal God. He summarized his view with the phrase, “There was a time when the Son was not,” a line that spread through catchy songs ordinary people would sing in streets and docks. For Arius, the Son was the first and highest creation, through whom God made everything else, but not equal to the Father and not co-eternal with Him.

The Debate

Alexander countered that this undermined the heart of the gospel. If Jesus is not fully God, then He cannot fully reveal God or save us with God’s own life. Alexander and his allies turned again and again to Scripture: “In the beginning was the Word, and the Word was with God, and the Word was God” (John 1:1); “The Word became flesh and made his dwelling among us” (John 1:14); “I and the Father are one” (John 10:30); and “For in Christ all the fullness of the Deity lives in bodily form” (Colossians 2:9). These texts declare that the Son shares the very being and glory of the Father, not a lesser, created status.

Constantine, hearing that the dispute was tearing churches apart, first tried to calm the waters with a letter urging both sides to make peace over what he considered a needless dispute, so long as unity was maintained. Yet the stakes were too high. The question was not a minor detail; it was the identity of Jesus and the nature of salvation. If Christ is not truly God, can He truly bring us into God’s life? To resolve this crisis, Constantine decided that the church needed a council that would bring together bishops from across the empire to seek a shared confession of faith.

Down to One Letter

At the heart of the debate was a single Greek word, and even a single letter:

HOMOOUSIOS = SAME SUBSTANCE (Jesus equals the Father’s divine nature)
HOMOIOUSIOS = SIMILAR SUBSTANCE (Jesus like the Father, but created—the ‘i’ flips it all)

That tiny iota made an enormous difference: one word protected the full deity of Christ, the other left room for Him to be a glorified creature.

“There was a time when the Son was not.” — Arius, sparking the fire.

Key verses Alexander used:

John 10:30: “I and the Father are one.”
Titus 2:13: “Our great God and Savior, Jesus Christ.”

The Council: Unity Amid Diversity

Constantine the Unifier

In May AD 325, roughly 250–318 bishops (ancient sources differ) gathered at Nicaea in Bithynia, near Constantine’s new imperial residence. Many bore physical marks of earlier persecutions—missing eyes, lamed limbs, scars from torture—embodied reminders that loyalty to Christ had recently been a crime against the state. They met in the imperial palace, where a copy of the Scriptures was placed centrally to symbolize that God’s word, not imperial pressure, was the ultimate authority.

Constantine entered without a bodyguard, dressed regally yet showing deference, and reportedly refused to sit until the bishops invited him to do so. He spoke only briefly, warning that “division in the church is worse than war,” because it endangers souls and undercuts the moral fabric of the empire. Then he stepped back and allowed the bishops to deliberate, debate, and pray.

Unity of the Church

Under the leadership of figures such as Hosius of Corduba and the young deacon Athanasius of Alexandria, the council focused on the heart of the question: Is the Son fully and eternally God, or is He a created being? They chose the word homoousios to confess that the Son is “of one substance with the Father,” thereby safeguarding His full deity and the reality that in Jesus we encounter God Himself. Arius’s teaching was condemned as heresy, his writings were ordered to be destroyed, and he was exiled. The Nicene Creed that emerged from this council became a landmark statement of Christian orthodoxy, later expanded at the Council of Constantinople in 381 but retaining the crucial language that the Son is of one being with the Father.

The bishops did more than settle the Christological dispute. They also addressed practical matters: agreeing on a common date for celebrating Easter to strengthen shared worship across regions, and issuing canons (church laws) dealing with issues like the reconciliation of lapsed believers and the structure of church leadership. In a world of diverse cultures and local customs, Nicaea helped weave scattered communities into a more visible, coherent body.

**Vasily Surikov’s 1876 fresco of the council—Constantine at the back, bishops debating in a grand hall with arched ceilings and passionate gestures.**

“Division in the church is worse than war.” — Constantine, setting the tone for a council called to heal wounds deeper than politics.

Why Nicaea still speaks to our chaos

For many people today, the Council of Nicaea feels distant—robes, Greek terms, imperial politics. Yet its struggle sits right in the middle of our questions about whether faith can still hold in a fractured, digital world. Nicaea insists that Jesus is not just an inspiring teacher or spiritual influencer, but God-with-us—the one in whom the fullness of God’s life, love, and authority is present. If that is true, then your worth does not hang on online approval, performance, or power; it rests in the God who stepped into history for you.

By confessing the Son as “of one substance with the Father,” the Nicene faith teaches that God is eternally Father, Son, and Spirit—a communion of love who creates and saves not out of need, but out of overflowing generosity. To be drawn into Christ is to be drawn into that communion. In a culture of isolation, this Trinity-shaped vision of God offers a way into real community, where unity is not uniformity and disagreement does not have to end in division. The same God who healed a fourth‑century church split invites our churches—and our hearts—into a deeper unity today, grounded not in slogans or tribal loyalties, but in the living Christ Nicaea confessed as “true God from true God.”

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Article Arc:

A world divided by outrage meets a God defined by unity.
One emperor, one council, one question: Who is Jesus, really?
A battle over a single iota reshaped the faith of billions.
When division tore the church apart, Nicaea dared to heal it.
The same truth that united ancient bishops can still mend modern hearts.