Romans 1:3

Concerning his Son, who was born of the seed of David according to the flesh.

Having already announced the origin of the gospel in God himself (Romans 1:1), Paul immediately introduced God's Son as the central fact of the good news, the gospel having but one center and that in Christ, Christ alone is the fulfillment of Old Testament prophecy, the embodiment of all Jewish hopes, the willing sacrifice, the sin-bearer, and the atonement. He, and he alone, is the architect of the crucifixion, the deliverer of God's redeeming word; indeed, he is that Word which was in the beginning with God, and which was God (John 1:1). Christ is the Hope of Israel, the Light of the Gentiles, the Lily of the Valley, the Bright and Morning Star, the Fairest of Ten Thousand, Wonderful, Counselor, Mighty God, Everlasting Father, Prince of Peace!

Of the seed of David ... The dual nature of Christ, both his divinity and humanity, are affirmed by Paul in this passage. As for the body that Jesus took when he decided to enter our earth life, it was descended through David, as attested by the genealogies of both Matthew and Luke, the very first verse of the New Testament hailing him as "the Son of David." However, it was only the humanity of Jesus that descended through David. In his totality, Christ descended from no man but was co-existent with the Father. Hebrews 2:14-16 plainly declares that Christ "take hold of" the seed of Abraham, thus affirming that he had an existence before assuming a human body.