The Athanasian Creed (Quicumque vult) is a Christianstatement of belief, focusing on Trinitarian doctrine and Christology. The Latin name of the creed, Quicumque vult, is taken from the opening words "Whosoever wishes." The Athanasian Creed has been used by Christian churches since the sixth century of the common era. 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.
A medieval account credited Athanasius of Alexandria, the famous defender of Nicene theology, as the author of the Creed. According to this account, Athanasius composed it during his exile in Rome, and presented it to Pope Julius as a witness to his orthodoxy. This traditional attribution of the Creed to Athanasius was first called into question in 1642 by Dutch theologian G.J. Voss, and it has since been widely accepted by modern scholars that the creed was not authored by Athanasius. Athanasius' name seems to have become attached to the creed as a sign of its strong declaration of Trinitarian faith. The reasoning for rejecting Athanasius as the author usually relies on a combination of the following:
The creed originally was most likely written in Latin, while Athanasius composed in Greek.
Neither Athanasius nor his contemporaries ever mention the Creed.
The use of the Creed in a sermon by Caesarius of Arles, as well as a theological resemblance to works by Vincent of Lérins, point to Southern Gaul as its origin. The most likely time frame is in the late fifth or early sixth century of the common era - at least 100 years after Athanasius. The theology of the creed is firmly rooted in the Augustinian tradition, using exact terminology of Augustine's On the Trinity (published 415 c.e.). In the late 19th century, there was a great deal of speculation about who might have authored the creed, with suggestions including Ambrose of Milan, Venantius Fortunatus, and Hilary of Poitiers, among others.  The 1940 discovery of a lost work by Vincent of Lérins, which bears a striking similarity to much of the language of the Athanasian Creed, have led many to conclude that the creed originated either with Vincent or with his students. For example, in the authorative modern monograph about the creed, J.N.D. Kelly asserts that Vincent of Lérin was not its author, but that it may have come from the same milieu, namely the area of Lérins in southern Gaul. The oldest surviving manuscripts of the Athanasian Creed date from the late 8th century.
The Athanasian Creed is usually divided into two sections: lines 1-28 addressing the doctrine of the Trinity, and lines 29-44 addressing the doctrine of Christology. Enumerating the three persons of the Trinity (i.e., Father, the Son, and the Holy Spirit), the first section of the creed ascribes the divine attributes to each individually. Thus, each person of the Trinity is described as uncreated (increatus), limitless (Immensus), eternal (æternus), and omnipotent (omnipotens).. While ascribing the divine attributes and divinity to each person of the Trinity, thus avoiding subordinationism, the first half of the Athanasian Creed also stresses the unity of the three persons in the one Godhead, thus avoiding a theology of tritheism. Furthermore, although one God, the Father, Son, and Holy Spirit are distinct from each other. For the Father is neither made nor begotten; the Son is not made but is begotten from the Father; the Holy Spirit is neither made nor begotten but proceeds from the Father and the Son (filioque).
Didactic as its content appears to contemporary readers, its opening sets out the essential principle that the Catholic faith does not consist in the first place in assent to propositions, but 'that we worship One God in Trinity, and Trinity and Unity'. All else flows from that orientation.
Its teaching about Jesus Christ is more detailed than in the Nicene Creed, and reflects the teaching of the Council of Ephesus (431) and the definition of the Council of Chalcedon (451). The 'Athanasian' Creed boldly uses the key Nicene term homoousios ('one substance', 'one in Being') not only with respect to the relation of the Son to the Father according to his divine nature, but that the Son is homoousios with his mother Mary, according to his human nature.
The final section of this Creed also moved beyond the Nicene (and Apostles') Creeds in making negative statements about the people's fate: "They that have done good shall go into life everlasting: and they that have done evil into everlasting fire." This caused considerable debate in England in the mid-nineteenth century, centred around the teaching of Frederic Denison Maurice.
Composed of 44 rhythmic lines, the Athanasian Creed appears to have been intended as a liturgical document - that is, the original purpose of the creed was to be spoken or sung as a part of worship. The creed itself uses the language of public worship, speaking of the worship of God rather than the language of belief ("Now this is the catholic faith: We worship one God"). Among medieval European Christian churches, this creed was recited following the Sunday sermon or at the Sunday Office of Prime. The creed was often set to music and used in the place of a Psalm.
In Reformed circles, it is included (for example) in the Christian Reformed Churches of Australia's Book of Forms (publ. 1991). That said, it is rarely recited in public worship.
In the successive Books of Common Prayer of the reformed Church of England from 1549 to 1662, its recitation was provided for on 19 occasions each year, a practice which continued until the nineteenth century, when vigorous controversy regarding its statement about 'eternal damnation' saw its use gradually decline. It remains one of the three Creeds approved in the Thirty-Nine Articles, and is printed in several current Anglican prayer books (eg A Prayer Book for Australia (1995)). As with Roman Catholic practice, its use is now generally only on Trinity Sunday or its octave.
In Roman Catholic churches, it was traditionally said at Prime on Sundays after Epiphany and Pentecost, except when a Double feast or day within an octave occurred, and on Trinity Sunday. In the 1960 reforms, it was reduced to once a year on Trinity Sunday. It has been effectively dropped from the Catholic liturgy since Vatican II, although it is retained in the Anglican Book of Common Prayer. It is however maintained in the Forma Extraordinaria, per the decree Summorum Pontificum, and also in the rite of exorcism, both in the Forma Ordinaria and the Forma Extraordinaria of the Roman Rite.
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 the Lutheran church. It is still used in the liturgy on Trinity Sunday.
↑Phillip Schaff, The Creeds of Chistendom, (Harper Brothers, 1877) 1.4.5; available online (retrived May 4, 2009).
↑Philip Pfatteicher, Commentary on the Lutheran Book of Worship, (Minneapolis:Augsburg, 1990), p. 444
↑Augusburg Confession, art. 1 references the Nicene Creed, but uses the language of the Athanasian: e.g., "There are three persons, coeternal and of the same essence and power." Formula of Concord, Solid Declaration, Summary 2. Second Helvetic Confession, Chapter 11. Belgic Confession, Article 9. 39 Articles, article 8. Bohemian Confession (1575), Article of faith 2.