“Whosoever will be saved, before all things it is necessary that he hold the catholic faith. Which faith except every one do keep whole and undefiled, without doubt he shall 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 Ghost. But the Godhead of the Father, of the Son, and of the Holy Ghost is all one: the glory equal, the majesty coeternal. 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 they are not three Eternals, but one Eternal. As there are not three Uncreated nor three Incomprehensibles, but one Uncreated and one Incomprehensible. So likewise the Father is almighty, the Son almighty, and the Holy Ghost almighty. And yet they are not three Almighties, but one Almighty. So the Father is God, the Son is God, and the Holy Ghost is God. And yet they 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 coeternal together, and coequal: so that in all things, as is 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 faithfully 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 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 catholic faith; which except a man believe faithfully and firmly, he cannot be saved.”
The Athanasian Creed, 6th century A.D. document, is a Christian statement of belief focused on Trinitarian doctrine and Christology. The Latin name: Quicunque vult, is taken from the opening words, "Whoever will". It is the first creed in which the equality of the three persons of the Trinity is explicitly stated and differs from the Nicene and Apostles' Creeds in the inclusion of anathemas, or condemnations of those who disagree with the creed as in the case of the Arians who denied the co-eternity and co-essentiality of Christ with God, the Father.
Arius & his followers argued that God is an abstract “monad,” alone unbegotten, without equal, eternal, unchangeable, ineffable, transcendental, and removed from the world by an impassable gulf. He could not create the world directly because of the total transcendence and inaccessibility of God. To bridge the chasm, Arius held that God created out of nothing, “before all times and eons,” an intermediate being, exalted above other creatures, thru whom He made the world and all things. This being is called the Son of God, the Logos, but he is not true God, true power (dynamis); he’s “not eternal,” but “dissimilar” (anomoios) in all respects from the essence of the Father. He is a perfect creature, yet not inherently sinless, but was capable of moral progress, choosing the good and continuing therein. He did not “fully know the Father nor his own nature.” In time this imaginary being assumed a human body, but not a human soul & redeemed humanity by showing how, as free moral agents, men might choose the good and become sons of God.
The formula of faith proposed by the Arians was summarily rejected and today, we adhere to the dedicated words of the Athanasian Creed and commonly use it once a year on Trinity Sunday to declare our faith in the Triune God: one in essence but three persons : Father , Son, and Holy Spirit. In Lutheranism, the Athanasian Creed is—along with the Apostles' and Nicene Creeds—one of the three ecumenical creeds placed at the beginning of the 1580 Book of Concord, the historic collection of authoritative doctrinal statements (confessions) of our beloved Ev. Lutheran Church.
The Shield of the Trinity, a visual representation of the doctrine of the Trinity, derived from the Athanasian Creed. The Latin reads: "The Father is God, The Son is God, The Holy Spirit is God; God is the Father, God is the Son, God is the Holy Spirit; The Father is not the Son, The Son is not the Father, The Father is not the Holy Spirit, The Holy Spirit is not the Father, The Son is not the Holy Spirit, The Holy Spirit is not the Son."
Finally, The Athanasian Creed was popular among monks of the Middle Ages who considered it well adapted to meditation and memorizing. In the time of Charlemagne it came to be used as a canticle at Prime. Luther called this Confession the grandest production of the Church since the times of the Apostles.
Do you know what LWML stands for? The Lutheran Women’s Missionary League. They use the following words as a Pledge stating their Mission and Purpose: “In fervent gratitude for the Savior’s dying love and His blood-bought gift of redemption, we dedicate ourselves to Him with all that we are and have; and in obedience to His call for workers in the harvest fields, we plege Him our willing service wherever and whenever He has need of us. We consecrate to our Savior our hands to work for Him, our feet to go on His errands, our voice to sing His praises, our lips to proclaim His redeeming love, our silver and our gold to extend His kingdom, our will to do His will, and every power of our life to the great task of bringing the lost and the erring into eternal fellowship with Him.”