Christ (title) facet of Christianity
Christ, used by Christians as both a name and a title, unambiguously refers to Jesus. It is also used as a title, in the reciprocal use "Christ Jesus", meaning "the Messiah Jesus", and independently as "the Christ". The Pauline epistles, the earliest texts of the New Testament, often refer to Jesus as "Christ Jesus" or "Christ".The concept of the Christ in Christianity originated from the concept of the messiah in Judaism. Christians believe that Jesus is the messiah foretold in the Hebrew Bible and the Christian Old Testament. Although the conceptions of the messiah in each religion are similar, for the most part they are distinct from one another due to the split of early Christianity and Judaism in the 1st century.
Although the original followers of Jesus believed Jesus to be the Jewish messiah, e.g. in the Confession of Peter, Jesus was usually referred to as "Jesus of Nazareth" or "Jesus, son of Joseph", Jesus came to be called "Jesus Christ" (meaning "Jesus the Khristós", i.e. "Jesus the Messiah" or "Jesus the Anointed") by Christians, who believe that his crucifixion and resurrection fulfill the messianic prophecies of the Old Testament.Christology
Christology, literally "the understanding of Christ," is the study of the nature (person) and work (role in salvation) of Jesus in Christianity. It studies Jesus Christ's humanity and divinity, and the relation between these two aspects; and the role he plays in salvation.
From the second to the fifth centuries, the relation of the human and divine nature of Christ was a major focus of debates in the early church and at the first seven ecumenical councils. The Council of Chalcedon in 451 issued a formulation of the hypostatic union of the two natures of Christ, one human and one divine, "united with neither confusion nor division". Most of the major branches of Western Christianity and Eastern Orthodoxy subscribe to this formulation, while many branches of Oriental Orthodox Churches reject it, subscribing to miaphysitism.
According to the Summa Theologica of Thomas Aquinas, in the singular case of Jesus, the word Christ has a twofold meaning, which stands for "both the Godhead anointing and the manhood anointed". It derives from the twofold human-divine nature of Christ (dyophysitism): the Son of man is anointed in consequence of His incarnated flesh, as well as the Son of God is anointing in consequence of the "Godhead which He has with the Father" (ST III, q. 16, a. 5).
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