The root origin of the word "son" is "sound". Sound as in the sounding words, sonar, sonata, song and sonic boom. Notice these two parallel, O.T. and N.T. "In the beginning" verses in Gen.1:1 and John 1:1.
In the beginning God created .... And God said, Let there be.... Gen.1:1-3
God spoke (words) the world, its light, contents and life into being.
"In the beginning was the Word and the Word was with God and the Word was God. The same was in the beginning with God. All things were made by him; and without him was not anything made that was made." John 1:1-3 (God's Word created) "The Word was with God and the Word was God."
"And the Word was made 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 1:14 (God's Word was made flesh) God's Word came and dwelt among us. This verse also says that God's Word was "the only begotten" ... Jesus"
God sent an angel and told Mary that she would be the human channel through whom he would come into the world, as her son, and His Son, and as the blood sacrifice for the sins of the world, in fulfillment of the the Old Testament blood sacrifices and prophecies of a coming Messiah.
"Jesus saith (words)unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Show us the Father? Believest thou not that I am in the Father, and the Father in me? the words that I speak unto you I speak not of myself: but the Father that dwelleth in me...." John 14:9-10.
The virgin Mary's human body produced an overy egg which was impregnated with a holy, Godly spermatogenesis, by the heavenly Father. As the Spirit of God moved upon the face of the waters in Genesis, that same Spirit moved upon Mary's Fallopian tube and placed a single, miraculous sperm cell in her egg, at her time of ovulation. That human egg was thus fertilized by God Himself, as Father, who created it. Mary's resulting pregnancy was both fully human and fully God. Since the Spirit of God deposited the sperm, the baby boy's Spirit was God, and since Mary's egg was of human origin, she would produce a human baby's body. The Spirit of Christ in Jesus was God and the body of Jesus was human and could therefore die for our sins that we might live... through His dying, which He could only do in a flesh and blood body.
God had thereby come into humanities presence, as a human person, in order to give that human body as a sinless sacrifice, by being "made sin", a sin offering, and as the scape goat, for the wages of our sins.
"For he (God) hath made him (Jesus) to be sin for us, (He) who knew no sin; that we might be made the righteousness of God in him." 2 Cor. 5:21.
The baby Jesus was filled with the Holy Spirit from His mother's womb and became the first born of many brethren...."For whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the firstborn among many brethren. Rom.8:29.
Jesus Christ is both God and the Son of God. His two fold nature was Spiritual and Physical. As Christ (Messiah) His Spirit was God. As the flesh and blood Son of Mary and of God, he was Jesus (Savior) who came to die, as a blood sacrifice, on the cross, for our sins. He was God's extension of Himself from heaven into human presence, with human needs. He was the Son and Sound of God's Word to the world from creation through the Revelation of Jesus Christ.
"The Revelation of Jesus Christ, which God gave unto him, to shew unto his servants things which must shortly come to pass; and he sent and signified it by his angel unto his servant John. Who bare record of the word of God, and of the testimony of Jesus Christ, and of all things that he saw. Blessed is he that readeth, and they that hear the words of this prophecy, and keep those things which are written therein: for the time is at hand." Rev.1:1-3.
And finally....
"Let this mind be in you, which was also in Christ Jesus: Who, being in the form of God, thought it not robbery to be equal with God: But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men: And being found in fashion as a man, he humbled himself, and became obedient unto death, even the death of the cross." Phil.2:5-8.