We believe in one God, the Father Almighty, maker of heaven and earth, and of all things visible and invisible. And in one Lord Jesus Christ, the Son of God, the only begotten, begotten of the Father before all ages. So not like Arius was arguing that there was a time where the Father existed before the Son existed. Here it says begotten of the Father, but before all ages. So there was always a time when there was a Son. Light of light, very God of very God, begotten, not made, of one essence with the Father, by whom all things were made. So once again, really addressing this Arian controversy, the Arian heresy as it becomes known, that the Father and the Son are of the same essence.