For unto us a Child is born; unto us a Son is given. Isaiah 9:6 KJV
For a child will be born to us, a son will be given to us. Isaiah 9:6 NASB
She brought forth her firstborn son and wrapped Him in swaddling clothes and laid Him in a manger. Luke 2:7 KJV
She gave birth to her firstborn son; and she wrapped Him in cloths, and laid Him in a manger. Luke 2:7 NASB
If we relegate our appreciation for the story of the advent of our Lord Jesus Christ to Christmastime alone, we are depriving our souls of enjoying one of the deepest sources of wonder and worship. “Immanuel, God with us!” The eternal, infinite God whose majesty and greatness is such that eternity alone is sufficient to be His habitation (Isa 57:15), became incarnate. All that God is was now “contained” in a babe of perhaps less than 10 pounds.
“Veiled in flesh the Godhead see.
Hail the Incarnate Deity.”
We need to speak reverently and carefully, but He inhabited the womb of Mary for nine months just as any other coming into our world. The Lord Jesus came into humanity as a baby. He was begotten of the Holy Spirit and conceived in the womb of Mary. The normal process of gestation was not hurried or sped up. All was natural, although His conception was supernatural.
The child was born! He knew an experience that Adam did not know. Adam came in as full-grown man. Adam never experienced infancy, childhood, and adolescence. He was never dependent on human parents to feed him, to carry him, or to protect him. And while the Lord was ultimately cast upon God from the womb (Ps 22), He allowed Himself to be dependent on a teenage mother and a human (legal) father, Joseph, for all His needs.
God with us, yet the child born. He is the mighty Creator whose fiat brought the creation with its billions upon billions of stars and universe after universe into being, yet He developed speech as every other infant and child does. His humanity was real. He continued to possess all Creatorial power – it was all resident in that infant and child. He chose, however, the normal stages of human development.
All things, all worlds, were being held together by this child who was born (Col 1:17), yet He was being held in the arms of one of His own creatures. In His incarnation, deity was not compromised; it was poured into human form. It was “compressed” into a small infant form.
Some may say, “I cannot understand how the eternal God could become a babe, a child, an adolescent, and then a man.” I freely own that I cannot either. Scripture reveals it, and we can only wonder and worship at what we cannot understand. Unto us a child has been born!
Consider:
Why do you think it is Dr. Luke alone who related the details of the birth of the Lord Jesus Christ?

Such wonderful mystery “ that God was manifest in flesh and dwelt among us” I remember an enjoyable quote from the late Harold Paisley Which I keep in the fly leaf of my bible:
He was no less God at his lowly birth than on the throne supreme,
his shoulders upheld heaven and earth as Mary held up Him.