The Creeds

Nicene-Constantinopolitan Creed:
Recognized today as the Nicene Creed, this creed was formulated to combat various heresies and is recited today as the primary affirmation of the Christian faith.
Its original form was accepted by the First Ecumenical Council (Nicaea, 325):

We believe in one God, the Father almighty, maker of all things, visible and invisible; And in one Lord Jesus Christ, the Son of God, begotten from the Father, only-begotten, that is, from the essence of the Father, God from God, light from light, true God from true God, begotten not made, of one essence with the Father, through Whom all things came into being, things in heaven and things on earth, Who because of us men and because of our salvation came down and became incarnate, becoming man, suffered and rose again on the third day, ascended to the heavens, and will come again to judge the living and the dead; And in the Holy Spirit.

The Second Ecumenical Council (Constantinople, 381) clarified its statement about the nature of Christ, and added a more complete statement regarding the Holy Spirit:

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 worlds, Light of Light, Very God of Very God, Begotten, not made; of one essence with the Father, by whom all things were made:Who for us men and for our salvation came down from heaven, and was incarnate of the Holy Spirit and the Virgin Mary, and was made man; And was crucified also for us under Pontius Pilate, and suffered and was buried; And the third day He rose again, according to the Scriptures; And ascended into heaven, and sitteth at the right hand of the Father; And He shall come again with glory to judge the living and the dead, Whose kingdom shall have no end.

And we believe in the Holy Spirit, the Lord, and Giver of Life, Who proceeds from the Father, Who with the Father and the Son together is worshipped and glorified, Who spoke by the Prophets;

And we believe in one, holy, catholic, and apostolic Church. We acknowledge one Baptism for the remission of sins. We look for the Resurrection of the dead, And the Life of the world to come. Amen

Chalcedonian Creed:
A profession of faith ascepted by the Fourth Ecumenical Council (Chalcedon, 451) and intended to counter monophysitism.

We, then, following the holy Fathers, all with one consent, teach men to confess one and the same Son, our Lord Jesus Christ, the same perfect in Godhead and also perfect in manhood;truly God and truly man, of a reasonable [rational] soul and body;consubstantial [co-essential] with the Father according to the Godhead, and consubstantial with us according to the Manhood;in all things like unto us, without sin; begotten before all ages of the Father according to the Godhead, and in these latter days, for us and for our salvation, born of the Virgin Mary, the Mother of God, according to the Manhood;one and the same Christ, Son, Lord, only begotten, to be acknowledged in two natures, inconfusedly, unchangeably, indivisibly, inseparably;the distinction of natures being by no means taken away by the union, but rather the property of each nature being preserved, and concurring in one Person and one Subsistence, not parted or divided into two persons, but one and the same Son, and only begotten, God the Word, the Lord Jesus Christ;as the prophets from the beginning [have declared] concerning Him, and the Lord Jesus Christ Himself has taught us, and the Creed of the holy Fathers has handed down to us.