Why did Paul not rehearse the details of Joseph and Mary in Galatians 4:4?
Paul did not need to rehearse the details of Joseph and Mary because those facts were already implied and had been prophesied. Instead, he moved directly to the crucial point: in the fullness of time, according to God's exact schedule, the Messiah was born in Bethlehem.
Les explains that Paul does not have to rehearse all the details of Joseph and Mary, because that has already been implied and was prophesied. Paul brings the reader right to the crucial point of Christ's birth in Bethlehem. Les also notes that this is the Christmas story, contrary to the idea that leaving the Gospels means losing the Christmas story. The birth happened because it was in God's timetable, at the exact right day, hour, and year, fulfilling the promise made back in Genesis chapter three, verse fifteen.
But when the fulness of the time was come, God sent forth his Son, made of a woman, made under the law,