Nicene Creed

The Nicene Creed, which was formulated during the first ecumenical council of the Church, was written in 325 A.D. This is one of the first Creeds of the Christian Church, it reads like this:

We believe in one God the Father almighty, creator of all things visible and invisible. And in our Lord Jesus Christ the Son of God, the only begotten born of the Father, that is of the substance of the Father, God of God, light of light, true God of true God, born, not made, of one substance with the Father (which they call in the Greek "homousion"), by whom all things were made, which are in heaven and on earth, who for our salvation came down, and became incarnate and was made man, and suffered, and rose again on the third day, and ascended into heaven, and will come to judge the living and the dead. And in the Holy Spirit.

While this creed has changed a bit over the years, what is written above is the original form of this creed. Due to the debate between the Arians and their opposers (e.g. Athanasius), this paragraph was placed immediately after the creed:

But those who say: "There was [a time] when he was not," and, "Before he was born, he was not," and "Because he was made from non-existing matter, he is either of another substance or essence," and those who call "God the Son changeable and mutable," these the Catholic Church anathematizes.