To my mind, Contantine may have had doubts about One G-d, but was very sure about One Empire and One Emperor.
When he sat as chair of the bishops at Nicea, he was head of the Roman State, Head of the Church (Pontifex Maximus) and had the power to set prices by fiat, so head of the roman economy.
6 was the perfect number, since the sum and product of its factors was the same (1+2+3 is 1x2x3). So 666 refered to someone perfect in these three spheres. Constantinius was the Antichrist, who twisted the Church from a voluntary community of faith to an established church with a bureaucracy, rules, and an arm of the Roman government.
Since that time, the Holy Spirit has been silent.
Revelations was written by John. 666 refers to John 6:66, "From this time many of his disciples turned back and no longer followed him."
The Council of Nicea was summoned, and presided over, by the Emperor Constantine.Constantine, Pontifex Maximus of the Roman state religion.
He called all the bishops of the eastern and western churches to attend.
The bishop of Rome was invited to attend but he chose not to attend.
One of the titles of the Roman Emperor was Pontifix Maximus,
a title given to the Roman Emperor by the king of Ephesus
who had inherited the title from BabylonThis title goes all the way back to Babylon and the beginnings of the mother-child
cult under Nimrod of Genesis 10 and his wife Sumerimus. Later,
Julius Caesar was elected Pontifex Maximus and when he became Emperor,
he became the supreme civil and religious ruler and head of Rome
politically and religiously with all the power and functions of the Babylonian pontiff.Here was the magnificent temple of Esculapius, a pagan god
whose idol was in the form of a serpent.
The inhabitants were known as the chief temple keepers of Asia.
When the Babylonian cult of the Magians was driven out of Babylon,
they found a haven in Pergamum.The title of the Magian high priest of Babylon was "Chief Bridge Builder"
meaning the one who spans the gap between mortals and Satan and his hosts.
In Latin this title was written "Pontifex Maximus,"
Revelation 2:12 "And to the angel of the church in Pergamum write:
The One who has the sharp two-edged sword says this:Revelation 2:13 'I know where you dwell, where Satan's throne is;
and you hold fast My name, and did not deny My faith
even in the days of Antipas, My witness, My faithful one,
who was killed among you, where Satan dwells.Revelation 2:14 'But I have a few things against you, because you
have there some who hold the teaching of Balaam,
who kept teaching Balak to put a stumbling block
before the sons of Israel, to eat things sacrificed
to idols and to commit {acts of} immorality.Revelation 2:15 'So you also have some who in the same way
hold the teaching of the Nicolaitans.