God the Son (Θεὸς ὁ υἱός, Deus Filius) is the second person of the Trinity in Christian theology. The doctrine of the Trinity identifies the Logos as the incarnation of God. United in essence (consubstantial), but distinct in person with regard to God the Father and God the Holy Spirit (the first and third persons of the Trinity). The phrase "God the Son" is not found in the Bible, but is found in later Christian sources. By scribal error the term is in one medieval manuscript, MS No.1985, where Galatians 2:20 has "Son of God" changed to "God the Son". The term in English follows Latin usage as found in the Athanasian Creed and other texts of the early church: In Greek "God the Son" is ho Theos ho huios (ὁ Θεός ὁ υἱός) as distinct from ho huios nominative tou Theou genitive, ὁ υἱός τοῦ Θεοῦ, "Son of God". In Latin "God the Son" is Deus (nominative) Filius (nominative). The term deus filius is found in the Athanasian Creed: "Et tamen non tres omnipotentes, sed unus omnipotens. Ita Deus Pater, Deus Filius, Deus [et] Spiritus Sanctus." (distinct from filius Dei genitive "son of God"), but this phrase is also translated "So the Father is God: the Son is God: and the Holy Ghost is God". God in Christianity The term deus filius is used in the Athanasian Creed and formulas such as Deus Pater, Deus Filius, Deus Spiritus Sanctus: Et non tres Dii, sed unus est Deus. The term is used by Augustine of Hippo in his On the Trinity, for example in discussion of the Son's obedience to God the Father: deo patri deus filius obediens. and in Sermon 90 on the New Testament "2. For hold this fast as a firm and settled truth, if you would continue Catholics, that God the Father begot God the Son without time, and made Him of a Virgin in time." The Augsburg Confession (1530) adopted the phrase as Gott der Sohn. Jacques Forget (1910) in the Catholic Encyclopedia article "Holy Ghost" notes that "Among the apologists, Athenagoras mentions the Holy Ghost along with, and on the same plane as, the Father and the Son.