James Montgomery Boice: The virgin birth is important because of its unique and miraculous nature, which therefore points to the uniqueness of Jesus Christ. It is significant that the life of the Lord Jesus is bracketed by two great miracles. At the beginning is the virgin birth; at the end is the resurrection.
Isaiah 7:14; Luke 1:32-33
“Therefore the Lord himself will give you a sign. Behold, the virgin shall conceive and bear a son, and shall call his name Immanuel.”
“He will be great and will be called the Son of the Most High. And the Lord God will give to him the throne of his father David, and he will reign over the house of Jacob forever, and of his kingdom there will be no end.”