As the Son of David:

The Lord Jesus was the legal heir to the throne which was being usurped by the Gentile king Herod. The Jews knew from their Scriptures that Christ, their Messiah, would be a Son of David. (Matt. 22:42.) David was the second king of Israel, replacing Saul who represents the first man-man in the flesh. God has set aside the first man. All blessing for man is connected with the second man, the Lord from heaven. David was not of the house of Saul, but a son of Abraham, the one to whom the promises of blessing were made.