The Letter of the Synod, relative to its Decisions: and the Condemnation of Arius and those who agreed with him
Constantine Augustus, to the Catholic church of the Alexandrians. Beloved brethren, hail! We have received from Divine Providence the inestimable blessing of being relieved from all error, and united in the acknowledgment of one and the same faith. The devil will no longer have any power against us, since all that which he had malignantly devised for our destruction has been entirely overthrown from the foundations. The splendor of truth has dissipated at the command of God those dissensions, schisms, tumults, and so to speak, deadly poisons of discord. Wherefore we all worship one true God, and believe that he is. But in order that this might be done, by divine admonition I assembled at the city of Nicæa most of the bishops; with whom I myself also, who am but one of you, and who rejoice exceedingly in being your fellow-servant, undertook the investigation of the truth. Accordingly, all points which seemed in consequence of ambiguity to furnish any pretext for dissension, have been discussed and accurately examined. And may the Divine Majesty pardon the fearful enormity of the blasphemies which some were shamelessly uttering concerning the mighty Saviour, our life and hope; declaring and confessing that they believe things contrary to the divinely inspired Scriptures. While more than three hundred bishops remarkable for their moderation and intellectual keenness, were unanimous in their confirmation of one and the same faith, which according to the truth and legitimate construction of the law of God can only be the faith; Arius alone beguiled by the subtlety of the devil, was discovered to be the sole disseminator of this mischief, first among you, and afterwards with unhallowed purposes among others also. Let us therefore embrace that doctrine which the Almighty has presented to us: let us return to our beloved brethren from whom an irreverent servant of the devil has separated us: let us go with all speed to the common body and our own natural members. For this is becoming your penetration, faith and sanctity; that since the error has been proved to be due to him who is an enemy to the truth, you should return to the divine favor. For that which has commended itself to the judgment of three hundred bishops cannot be other than the doctrine of God; seeing that the Holy Spirit dwelling in the minds of so many dignified persons has effectually enlightened them respecting the Divine will. Wherefore let no one vacillate or linger, but let all with alacrity return to the undoubted path of duty; that when I shall arrive among you, which will be as soon as possible, I may with you return due thanks to God, the inspector of all things, for having revealed the pure faith, and restored to you that love for which you have prayed. May God protect you, beloved brethren.
Thus wrote the emperor to the Christians of Alexandria, assuring them that the exposition of the faith was neither made rashly nor at random, but that it was dictated with much research, and after strict investigation: and not that some things were spoken of, while others were suppressed in silence; but that whatever could be fittingly advanced in support of any opinion was fully stated. That nothing indeed was precipitately determined, but all was previously discussed with minute accuracy; so that every point which seemed to furnish a pretext for ambiguity of meaning, or difference of opinion, was thoroughly sifted, and its difficulties removed. In short he terms the thought of all those who were assembled there the thought of God, and does not doubt that the unanimity of so many eminent bishops was effected by the Holy Spirit. Sabinus, however, the chief of the heresy of the Macedonians, willfully rejects these authorities, and calls those who were convened there ignorant and illiterate persons; nay, he almost accuses Eusebius of Cæsarea himself of ignorance: nor does he reflect, that even if those who constituted that synod had been laymen, yet as being illuminated by God, and the grace of the Holy Spirit, they were utterly unable to err from the truth. Nevertheless, hear farther what the emperor decreed in another circular both against Arius and those who held his opinions, sending it in all directions to the bishops and people.
Another Epistle of Constantine.
Victor Constantine Maximus Augustus, to the bishops and people.— Since Arius has imitated wicked and impious persons, it is just that he should undergo the like ignominy. Wherefore as Porphyry, that enemy of piety, for having composed licentious treatises against religion, found a suitable recompense, and such as thenceforth branded him with infamy, overwhelming him with deserved reproach, his impious writings also having been destroyed; so now it seems fit both that Arius and such as hold his sentiments should be denominated Porphyrians, that they may take their appellation from those whose conduct they have imitated. And in addition to this, if any treatise composed by Arius should be discovered, let it be consigned to the flames, in order that not only his depraved doctrine may be suppressed, but also that no memorial of him may be by any means left. This therefore I decree, that if any one shall be detected in concealing a book compiled by Arius, and shall not instantly bring it forward and burn it, the penalty for this offense shall be death; for immediately after conviction the criminal shall suffer capital punishment. May God preserve you!
Another Epistle.
Constantine Augustus, to the Churches.
Source: Ecclesiastical History (New Advent)