The Athanasian Creed
THE Catholic Faith is this :
That we worship one God in Trinity, and Trinity in Unity; Neither confounding the Persons : nor dividing the Substance. For there is one Person of the Father, another of the Son : and another of the Holy Ghost. But the Godhead of the Father, of the Son, and of the Holy Ghost, is all one : the Glory equal, the Majesty co-eternal. Such as the Father is, such is the Son : and such is the Holy Ghost. The Father uncreated, the Son uncreated : and the Holy Ghost uncreated. The Father incomprehensible, the Son incomprehensible : and the Holy Ghost incomprehensible. The Father eternal, the Son eternal : and the Holy Ghost eternal. And yet there are not three eternals : but one eternal. As also there are not three incomprehensibles, nor three uncreated : but one uncreated and one incomprehensible. So likewise the Father is Almighty, the Son Almighty : and the Holy Ghost Almighty. And yet there are not three Almighties : but one Almighty. So the Father is God, the Son is God : and the Holy Ghost is God. And yet there are not three Gods : but one God. So likewise the Father is Lord, the Son Lord : and the Holy Ghost Lord. And yet not three Lords : but one Lord. For like as we are compelled by the Christian verity : to acknowledge every Person by himself to be God and Lord; So are we forbidden by the Catholic Religion : to say, There be three Gods or three Lords. The Father is made of none : neither created nor begotten. The Son is of the Father alone : not made nor created, but begotten. The Holy Ghost is of the Father and of the Son : neither made, nor created, nor begotten, but proceeding. So there is one Father, not three Fathers; one Son, not three Sons : one Holy Ghost, not three Holy Ghosts. And in this Trinity none is before or after other : none is greater, or less than another; But the whole three Persons are co-eternal together : and co-equal. So that in all things, as is aforesaid : the Unity in Trinity, and the Trinity in Unity is to be worshiped.
Furthermore, it is necessary to everlasting salvation : that he also believe rightly the Incarnation of our Lord Jesus Christ.
For the right Faith is, that we believe and confess : that our Lord Jesus Christ, the Son of God, is God and Man; God, of the Substance of the Father, begotten before the worlds : and Man, of the substance of His Mother, born in the world; Perfect God and perfect Man : of a reasonable soul and human flesh subsisting; Equal to the Father, as touching his Godhead : and inferior to the Father, as touching His Manhood; Who although He be God and Man : yet He is not two, but one Christ; One; not by conversion of the Godhead into flesh : but by taking of the Manhood into God; One altogether; not by confusion of Substance : but by unity of Person. For as the reasonable soul and flesh is one man : so God and Man is one Christ; Who suffered for our salvation : descended into hell; rose again the third day from the dead; He ascended into heaven, he sitteth on the right hand of the Father, God Almighty : from whence He shall come to judge the quick and the dead. At whose coming all men shall rise again with their bodies : and shall give an account of their own works. And they that have done good shall go into life everlasting : and they that have done evil, into everlasting fire.
This is the Catholick Faith : which except a man believe faithfully, he cannot be saved.