Remember God is One divine being shared equally by three distinct persons; the Father, the Son and the Holy Spirit (Matthew 28:19). It wasn’t the Father, nor the Spirit, that took on flesh and was born of a virgin; it was the Word (the Son).
 
And by becoming a man, the Son did not lose His divinity but simply added to His nature humanity; thus Jesus was and is fully God and fully man (Philippians 2:6-10 & Colossians 1:15-17). For even after His resurrection, Jesus has chosen to stay in union with the flesh as means of re-making humanity in His image, both in spirit and body (Romans 8:29).
 
Notice the doctrine of the Son’s Incarncation (taking on flesh) and His accomplishments in the following five passages:
  1. THE SON’S NATURE AS GOD: John 1:1, “In the beginning was the Word, and the Word was with God, and the Word was God.”
  2. THE SON’S NATURE AS MAN: John 1:14, “The Word became flesh and made his dwelling among us. We have seen his glory, the glory of the one and only Son, who came from the Father, full of grace and truth.”
  3. THE SON’S RELATIONSHIP TO THE FATHER: John 1:18, “No one has ever seen God, but the one and only Son, who is himself God and is in closest relationship with the Father, has made him known.”
  4. THE SON’S ROLE IN THE SALVATION OF HUMANITY: John 3:16, “For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.”
  5. THE SON’S ROLE IN THE RE-CREATION OF HUMANITY: Romans 8:29-30, “29 For those God foreknew he also predestined to be conformed to the image of his Son, that he might be the firstborn among many brothers and sisters. 30 And those he predestined, he also called; those he called, he also justified; those he justified, he also glorified.”