The Holy Trinity has had a problematic history, partly evidenced by point of fact that theologians still don’t agree on how it works, and partly seen from its ex post facto evolution, shoehorned into the scant evidence of the biblical texts. From Ignatius of Antioch onwards we see development of the idea in early church thinking, until it is codified at the Council of Nicaea in the 4th century CE. There will be more talk later on what was creedally set out.