The books of the prophets [Jewish Old Testament scriptures(the Tanakh)] , long before the Greek, Romans or Nicea foretold that God himself would come to men and would be “seen by all flesh”
“Hark! one calleth: ‘Clear ye in the wilderness the way of the LORD, make plain in the desert a highway for our God. Every valley shall be lifted up, and every mountain and hill shall be made low; and the rugged shall be made level, and the rough places a plain; and the glory of the LORD shall be REVEALED , and all FLESH shall SEE it together; for the mouth of the LORD hath spoken it.
Tanakh Jewish Bible Isaiah 40:3-5
From this verse—without a shadow of doubt—God himself was coming to the earth and would be SEEN in a human body (flesh) by all flesh (men). But who was to prepare the way for ‘the Lord’/’our God’?
“Behold, I send My messenger, and he shall clear the way before Me; and the Lord, whom ye seek, will SUDDENLY come to His temple, and the messenger of the COVENANT, whom ye delight in, behold, he cometh, saith the LORD of hosts.”
Tanakh Jewish Bible Micah 3:1
In the above verse, God is speaking, and He says that the messenger (John the Baptist) would prepare the way “before Me.” SUDDENLY? Yes. Jesus (or his ministry) came IMMEDIATELY after John and not centuries later. It is the LORD God Himself who was coming! Then, God says it is “the Lord” who will come, “the messenger of the covenant.” So, God is EQUATED with the Lord who was to come. It is one of many occasions where Jesus is called “God”.
So God became flesh through being born of a virgin (symbolizing purity).
“The beginning of the gospel of Jesus Christ, the Son of God. As it is written in the Prophets: “Behold, I send My messenger before Your face, Who will prepare Your way before You.” “The voice of one crying in the wilderness: ‘Prepare the way of the Lord; Make His paths straight.’ ” John came baptizing in the wilderness and preaching a baptism of repentance for the remission of sins.
Mark 1:1-4
John the Baptist was therefore the Messenger spoken of by Isaiah sent by God to prepare the way for Him.
“In the beginning was the Word, and the Word was with God, and the Word was God. And the Word became flesh and dwelt among us, and we beheld His glory, the glory as of the only begotten of the Father, full of grace and truth.
John 1:1, 14
The Word—which is God—became flesh, became Jesus.