Adam and Eve disobeyed God (Ge 3:6). One of God's responses was to the serpent. He said, "'I will put enmity between you and the woman, and between your seed and her seed; He shall bruise you on the head'" (:15). When you consider God had said to Adam, "'Be fruitful and multiply, and fill the earth'" (1:28), Eve's seed could be anyone. But God had a plan. Ultimately an angel announced that, "today in the city of David there has been born for you a Savior, who is Christ the Lord'" (Lk 2:11). Matthew records a "genealogy of Jesus the Messiah, the son of David" (Mt 1:1). "Jesus was born, who is called the Messiah" (:16). The name "Christ" means that God had anointed him supernaturally with power to accomplish what he had been assigned to do. It was further explained that "'the Lord God will give Him the throne of His father David; and He will reign over the house of Jacob forever, and His kingdom will have no end'" (Lk 1:32-33). Jesus asked the Pharisees, "'What do you think about the Christ, whose son is He?'" (Mt 22:42). They answered, "'The son of David'" (:42).
The Jews believed this because of what Nathan prophesied to King David that, "the Lord also declares to you that . . . I will raise up your descendant after you, who will come forth from you . . . and I will establish the throne of his kingdom forever'" (2Sa 7:11-13). David prayed that God would "'confirm it forever, and do as You have spoken'" (:25). Even though there is no eschatological foundation in the Old Testament for a Davidic dynasty, Jews regarded the promise as God potentially returning to restore Israel's monarchy. There is a Hebrew word "mashah" which deals with anointing with oil. The word "mashiach" comes from it which refers to the "anointed one" who would become this messianic king. Paul said to the Thessalonians, "'This Jesus whom I am proclaiming to you is the Christ'" (Ac 17:3).