But at the end of the Roman Empire and as we get into the Middle Ages, this was a major issue of philosophical and it would sometimes bleed over into political debate. And so Constantine, who we mentioned, has a sympathy towards the Christians. He allows Christianity to be tolerated. He does not like this idea of this debate and he wants to help unify the Christians. So in 325, he calls the Council of Nicaea to help resolve this controversy, which gets known as the Arian Controversy, named after Arius of Alexandria. Now, it's worth mentioning, Arius wasn't the first person to make this argument that the Father in some way was more divine than the Son because he begat the Son. He existed before the Son.