Whoever will be saved, before all things it is necessary that he hold the catholic faith. Whoever does not keep this faith whole and undefiled shall without doubt perish everlastingly.
And 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 Spirit. But the Godhead of the Father, of the Son, and of the Holy Spirit is all one: the glory equal, the majesty coeternal.
Such as the Father is, such is the Son, and such is the Holy Spirit. The Father is uncreated, the Son is uncreated, and the Holy Spirit is uncreated. The Father is infinite, the Son is infinite, and the Holy Spirit is infinite. The Father is eternal, the Son is eternal, and the Holy Spirit is eternal. And yet they are not three eternals, but one eternal. As also there are not three uncreated, nor three infinites, but one uncreated and one infinite.
So likewise, the Father is Almighty, the Son is Almighty, and the Holy Spirit is Almighty. And yet they are not three Almighties, but one Almighty. So, the Father is God, the Son is God, and the Holy Spirit is God. And yet they are not three Gods, but one God. So likewise, the Father is Lord, the Son Lord, and the Holy Spirit Lord. And yet not three Lords, but one Lord.
For as we are compelled by Christian truth to confess each Person to be both God and Lord;
So we are forbidden by the catholic religion to say there are 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 Spirit 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 Spirit, not three Holy Spirits.
And in this Trinity, none is before or after another; none is greater or less than another. But all three Persons are coeternal and coequal. So that in all things, as aforesaid, the Unity in Trinity and the Trinity in Unity is to be worshiped. He therefore that will be saved must thus think of the Trinity.
Furthermore, it is necessary to everlasting salvation that he also believe rightly in 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 is God and man, 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 sits on the right hand of the Father God Almighty. From there He shall come to judge the living and the dead.
At whose coming all men shall rise again with their bodies; and will give account for their own works.
And those who have done good will go into life everlasting; and those who have done evil into everlasting fire. This is the catholic faith, which unless a man believes faithfully and firmly, he cannot be saved.