The gospel of Matthew begins with a genealogy of Jesus. This history of Jesus’ ancestors serves a very important purpose. Any individual who would claim to be the Christ would be taken seriously only if he could prove to the Jew that his lineage was in accord with the prophecies concerning the coming “Son of David.”
In both Matthew 1 and Luke 3, the lists supplied show Jesus to be a son of Abraham, a son of Isaac (the son of promise, through whom all nations of the earth would be blessed), a son of Judah (the tribe from whom the Kings came), and the son of David.
In all, according to the record of Matthew, 42 generations spanned the time from Abraham until the day that the Christ was born into the world.
The word “Christ” is an important one. Jesus was the “annointed of God,” the Messiah come into the world. Matthew later recorded these angelic words, “And she will bring forth a Son, and you shall call His name JESUS, for He will save His people from their sins” (vs. 21). Jesus, the son of Abraham, the son of David, Savior of the world.