(From the council held at Ariminum in 359 AD.)
We believe in one only true God, the Father Almighty, of whom are all things. And in the only-begotten Son of God, who before all ages and before every beginning was begotten of God, through whom all things were made, both visible and invisible; alone begotten, only-begotten of the Father alone, God of God; like the Father that begat Him, according to the Scriptures, whose generation no one knows except only the Father that begat Him. This only-begotten Son of God, sent by His Father, we know to have come down from heaven, as it is written, for the destruction of sin and death; begotten of the Holy Ghost and the virgin Mary, as it is written, according to the flesh. Who companied with His disciples, and when the dispensation was fulfilled, according to the Father’s will, was crucified, died and was buried, and descended to the world below, at whom Hell himself trembled. On the third day He rose from the dead and companied with His disciples forty days. He was taken up into Heaven, and sits on the right hand of His Father, and is coming at the last day of the Resurrection, in His Father’s glory, to render to everyone according to his works. And we believe in the Holy Ghost, which the only-begotten Son of God, Jesus Christ, both God and Lord, promised to send to man, the Comforter, as it is written, the Spirit of Truth. This Spirit He Himself sent after He had ascended into Heaven and sat at the right hand of the Father, from there to come to judge both the living and the dead.
But the word ‘substance,’ which was too simply inserted by the Fathers, and, not being understood by the people, was a cause of scandal through its not being found in the Scriptures, it has seemed good to us to remove, and that for the future no mention whatever be permitted of the ‘substance’ of the Father and the Son. Nor must one ‘essence’ be named in relation to the person of Father, Son, and Holy Ghost. And we call the Son like the Father, as the Holy Scriptures call Him and teach; but all the heresies, both those already condemned, and any, if such there be, which have risen against the document thus put forth, let them be anathema.
If anyone denies that Christ our Lord, the Son of God, was begotten of the Father before the ages, let him be anathema.
If anyone denies that the Son is like the Father according to the Scriptures, let him be anathema.
If anyone does denies that the Son of God is co-eternal with the Father, let him be anathema.
If anyone says that the Son of God is a creature, like other creatures, let him be anathema.
If anyone says that the Son is from nothing and not from God the Father, let him be anathema.
If anyone says that there was a time when the Son was not, let him be anathema.