God-man (Greek: Theanthropos; Latin: Deus homo) refers to the Incarnation of God the Logos as described in orthodox Christian theology and mysticism.
The first usage of the term God-man as a theological concept appears in the writing of the Christian Apostolic Father Origen in the 3rd century AD:
The Council of Chalcedon, meeting in 451, affirmed that Christ had two natures – human and divine – in hypostatic union.
Much is also written of the God-man by the medieval philosopher and theologian Anselm of Canterbury (11th century) in his treatise on the atonement, Cur Deus Homo (Why God Became Man):
The term is used in Protestant documents such as the Westminster Larger Catechism, where it says that "Christ is exalted in his sitting at the right hand of God, in that as God-man he is advanced to the highest favour with God the Father," (Q&A 54).
The word is also found in religious poetry and essays of the Romantic era. An example can be found in the poetry of Goethe: