NPNF2-01. Eusebius Pamphilius: Church History, Life of Constantine, Oration in Praise of Constantine

Chapter LXIV.—Constantine’s Letter to Alexander the Bishop, and Arius the Presbyter.

“Victor Constantinus, Maximus Augustus, to Alexander and Arius.

“I call that God to witness, as well I may, who is the helper of my endeavors, and the Preserver of all men, that I had a twofold reason for undertaking that duty which I have now performed.