This Day in History: The Edict of Thessalonica (also known as Cunctos populos), issued on 27 February AD 380 by three reigning Roman emperors, made the Catholicism of Nicene Christians in the Great Church the state church of the Roman Empire. It condemned other Christian creeds such as Arianism as heresies of "foolish madmen," and authorized their punishment.
The Edict is as follows: "It is our desire that all the various nations which are subject to our Clemency and Moderation, should continue to profess that religion which was delivered to the Romans by the divine Apostle Peter, as it has been preserved by faithful tradition, and which is now professed by the Pontiff Damasus and by Peter, Bishop of Alexandria, a man of apostolic holiness. According to the apostolic teaching and the doctrine of the Gospel, let us believe in the one deity of the Father, the Son, and the Holy Spirit, in equal majesty and in a Holy Trinity. We authorize the followers of this law to assume the title of Catholic Christians; but as for the others, since, in our judgment, they are foolish madmen, we decree that they shall be branded with the ignominious name of heretics, and shall not presume to give to their conventicles the name of churches. They will suffer in the first place the chastisement of the divine condemnation and in the second the punishment of our authority which in accordance with the will of Heaven we shall decide to inflict."
However, it is helpful to know much the church and the state at this time had flip-flopped on the issue of the Trinity doctrine. From wikipedia: "In 313 the emperor Constantine I, together with his eastern counterpart Licinius, issued the Edict of Milan, which granted religious toleration and freedom for persecuted Christians. By 325 Arianism, a school of christology which contended that Christ did not possess the divine essence of the Father but was rather a primordial creation and an entity subordinate to God, had become sufficiently widespread and controversial in Early Christianity that Constantine called the Council of Nicaea in an attempt to end the controversy by establishing an empire-wide, i.e., "ecumenical" orthodoxy. The council produced the original text of the Nicene Creed, which rejected the Arian confession and upheld that Christ is "true God" and "of one essence with the Father."
However, the strife within the Church did not end with Nicaea, and the Nicene credal formulation remained contentious even among anti-Arian churchmen. Constantine, while urging tolerance, began to think that he had come down on the wrong side, and that the Nicenes—with their fervid, reciprocal persecution of Arians—were actually perpetuating strife within the Church. Constantine was not baptized until he was near death (337), choosing a bishop moderately sympathetic to Arius, Eusebius of Nicomedia, to perform the baptism.
Constantine's son and successor in the eastern empire, Constantius II was partial to the Arian party, and even exiled pro-Nicene bishops. Constantius' successor Julian (later called "The Apostate") was the only emperor after the conversion of Constantine to reject Christianity, attempting to fragment the Church and erode its influence by encouraging a revival of religious diversity, calling himself a "Hellene" and supporting forms of Hellenistic religion. He championed the traditional religious cultus of Rome as well as Judaism, and furthermore declared toleration for all the various unorthodox Christian sects and schismatic movements. Julian's successor Jovian, a Christian, reigned for only eight months and never entered the city of Constantinople. He was succeeded in the east by Valens, an Arian.
By 379, when Valens was succeeded by Theodosius I, Arianism was widespread in the eastern half of the Empire, while the west had remained steadfastly Nicene. Theodosius, who had been born in Hispania, was himself a Nicene Christian and very devout. In August, his western counterpart Gratian promoted persecution of heretics in the west."
A timeline may be also be helpful to understand the confusion:
325 AD - Constantine convenes the Council of Nicaea in order to develop a statement of faith that can unify the church. The Nicene Creed is written, declaring that "the Father and the Son are of the same substance" (homoousios). Emperor Constantine who was also the high priest of the pagan religion of the Unconquered Sun presided over this council.
At the end of this council, Constantine sided with Athanasius (the chief defender of Trinitarianism) over Arius (the anti-Trinitarian who defended the position that the Son was subordinate to the Father) and exiled Arius to Illyria.
328 AD - Athanasius becomes bishop of Alexandria.
328 AD - Constantine recalls Arius from Illyria.
335 AD - Constantine now sides with Arius and exiles Athanasius to Trier.
337 AD - A new emperor, Contantius, orders the return of Athanasius to Alexandria.
339 AD - Athanasius flees Alexandria in anticipation of being expelled.
341 AD - Two councils are held in Antioch this year. During this council, the First, Second, and Third Arian Confessions are written, thereby beginning the attempt to produce a formal doctrine of faith to oppose the Nicene Creed.
343 AD - At the Council of Sardica, Eastern Bishops demand the removal of Athanasius.
346 AD - Athanasius is restored to Alexandria.
351 AD - A second anti - Nicene council is held in Sirmium.
353 AD - A council is held at Aries during Autumn that is directed against Athanasius.
355 AD - A council is held in Milan. Athanasius is again condemned.
356 AD - Athanasius is deposed on February 8th, beginning his third exile.
357 AD - Third Council of Sirmium is convened. Both homoousios and homoiousios are avoided as unbiblical, and it is agreed that the Father is greater than His subordinate Son.
359 AD - The Synod of Seleucia is held which affirms that Christ is "like the Father," It does not however, specify how the Son is like the Father.
361 AD - A council is held in Antioch to affirm Arius' positions.
380 AD - Emperor Theodosius the Great declares Christianity the official state religion of the empire.
381 AD - The First Council of Constantinople is held to review the controversy since Nicaea. Emperor Theodosius the Great establishes the creed of Nicaea as the standard for his realm. The Nicene Creed is re-evaluated and accepted with the addition of clauses on the Holy Spirit and other matters.
If you believe that Nicaea just formalized the prevalent teaching of the church, then there really should not have been any conflicts. Why should there be? If it were the established teaching of the church, then you would expect people to either accept it, or not be Christians. It would be like me being a member of the Communist Party. I would join it knowing that they do not believe in the ownership of private property, no conflict. But now, say after I have been a member of the party for a few years, someone decides to introduce a proposal that we allow the ownership of private property, not everyone in the party is going to agree, the result is conflict. This is similar to what happened in the church. It was not the established teaching, and when some faction of the church tried to make it official, the result was major conflict.
It was mainly a theological power grab by certain factions of the church. The major complication throughout all this was that the emperors were involved. At Nicaea it was Constantine that decided the outcome. Then as you can see, we have the flip-flopping of opinion with the result that Athanasius is exiled and recalled depending on who is in power. We even have in 357 AD the declaration that homoousios and homoiousios are unbiblical, and that the Father is greater than His subordinate Son.
This is 180 degrees from Nicaea. It is definitely not the Trinitarian formula.
In 380 AD Emperor Thedosius declares Christianity the state religion. One can come to the conclusion that whichever way Theodosius favors, that is the way in which it is going to end. This is exactly what happened next.
In 381 AD the struggle was finally ended by the current emperor, Theodosius the Great, who favored the Nicene position. Just like at Nicaea, the EMPEROR again decided it. The emperors were dictating the theology of the church.
The big difference now was that there was not going to be any more changing sides. It was now the state religion. You cannot make Christianity the state religion and then change its beliefs every few years. It would undermine its credibility as the true faith. The Trinity was now the orthodox position, and the state was willing to back it up. Debates however, would continue for years to come. JB
