Pre-Christ(ian), I think not, paganism usurped the primeval revelation of God ...

... the mystery of Christ.
The God head, three-in-one.

Acts 15:18 (KJV) 18 Known unto God are all his works from the beginning of the world.

Hebrews 13:8 (KJV) 8 Jesus Christ the same yesterday, and to day, and for ever.

Malachi 3:6 (KJV) 6 For I [am] the LORD, I change not; [.]