It was several hundred years after the life of Jesus before many Christians accepted the idea that God was a Trinity. It was a difficult idea, because the Hebrew scriptures talk about God being One. The Greeks and the Romans could only understand Christ as a person who was bringing God’s Word. It was not until the 4th century that the three were recognised as being the three parts of one whole God. This was decided by the Council of Nicaea in 325. By the end of the century many Christians had been swayed to believe in God as a Trinity.