Halcyon
Lord of the Badgers
Specifically the concept of God as three persons (hypostases).
Did Valentinus bring to Christendom the Trinity as it is currently understood?
(Quotes taken from this wikipedia article)
Marcellus of Ancyra said:"Valentinus, the leader of a sect, was the first to devise the notion of three subsistent entities (hypostases), in a work that he entitled On the Three Natures. For, he devised the notion of three subsistent entities and three persons — father, son, and holy spirit."
Now with the heresy of the Ariomaniacs, which has corrupted the Church of God...These then teach three hypostases, just as Valentinus the heresiarch first invented in the book entitled by him 'On the Three Natures'. For he was the first to invent three hypostases and three persons of the Father, Son and Holy Spirit, and he is discovered to have filched this from Hermes and Plato.
Did Valentinus bring to Christendom the Trinity as it is currently understood?
(Quotes taken from this wikipedia article)