When was the discovery of Holy Trinity?

Answer 1

The concept of the Holy Trinity seems to have evolved in the third century. This became controversial in the early part of the fourth century, with some support for the doctrine and some strong opposition. The Council of Nicaea approved the doctrine, known as Trinitarianism, but the opposing doctrine, Arianism, continued to have strong support and almost won the day. Finally, at the end of the century, Emperor Theodosius declared Arianism to be heresy.

There is no evidence for or against Trinitarianism in The Bible, although a passage known as the 'Johannine Comma' (1 John 5:7) does refer indirectly to the concept of the Trinity. However, the 'Johannine Comma' was never in the early Greek manuscripts, only appearing in the Latin translation of the fifth century, long after the Trinity doctrine had been accepted by the Council of Nicaea.