The Nicene Creed was written in A.D.325 by the famous Council of Nicea. This Creed, like most of the others was written against a certain heresy. In this case it was the Arian Heresy which stated that Jesus is the greatest creature, but is not God.
The Apostles’ Creed and the Nicene Creed are very similar in what they say. The Nicene Creed just has some minor additions. Also the Nicene Creed uses the pronoun “we” instead of “I” because it was writen by a council and not as a baptismal statement. So then here it is:
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 only-begotten Son of God, begotten of the Father before all worlds; God of God, Light of Light, very God of very God; begotten, not made, being of one substance with the Father, by whom all things were made.
Who, for us men for our salvation, came down from heaven, and was incarnate by the Holy Spirit of the virgin Mary, and was made man; and was crucified also for us under Pontius Pilate; He suffered and was buried; and the third day He rose again, according to the Scriptures; and ascended into heaven, and sits on the right hand of the Father; and He shall come again, with glory, to judge the quick and the dead; whose kingdom shall have no end.
And we believe in the Holy Ghost, the Lord and Giver of Life; who proceeds from the Father and the Son; who with the Father and the Son together is worshipped and glorified; who spoke by the prophets.
And we believe one holy catholic* and apostolic Church. I acknowledge one baptism for the remission of sins; and I look for the resurrection of the dead, and the life of the world to come. Amen.
*please note that the term “catholic” means “universal” and does not refer to the Roman Catholic Church.

