Nicene and Post-Nicene Fathers: Series II/Volume I/Constantine/The Life of Constantine/Book II/Chapter 64
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.