"For unto us a Child is born,
Unto us a Son is given..." Isaiah 9:6

Right here in Isaiah Scripture tells us of Jesus' humanity and His deity.
He is wholly man and wholly God. Let us see some of what the Scriptures
tell us of both.

'Unto us a Child is born' -- His humanity
Predicted as seed of woman:
"And I will put enmity
Between you and the woman,
And between your seed and her Seed..." Genesis 3:15

Prophesied:
"And behold, you will conceive in your womb and bring forth a Son, and shall
call His name Jesus." Luke 1:31

"Therefore the Lord Himself will give you a sign: Behold, the virgin shall
conceive and bear a Son, and shall call His name Immanuel." Isaiah 7:14

His humanity is manifested in the incarnation:
"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 1:14

"For what the law could not do in that it was weak through the flesh, God
did by sending His own Son in the likeness of sinful flesh." Romans 8:3

Of Christ Jesus, Paul tells us,
"But made Himself of no reputation, taking the form of a servant, and coming
in the likeness of men.
And being found in appearance as a man, He humbled Himself and became
obedient to the point of death, even the death of the cross."
Philippians 2:7-8 (Read the whole example that Jesus gives us of humility in
Vs. 5-8)

"By this you know the Spirit of God: Every spirit that confesses that Jesus
Christ has come in the flesh is of God." 1 John 4:2

Some other proofs--
His circumcision:
"And when eight days were completed for the circumcision of the Child, His
name was called Jesus, the name given by the angel before He was conceived
in the womb." Luke 2:21

His growth:
"And Jesus increased in wisdom (in broad and full understanding) and in
stature and years, and in favor with God and man."
Luke 2:52 The Amplified Bible

His genealogy as we see in Matthew 1:1-17.
Verse 1 begins, "The book of the genealogy of Jesus Christ..."

Then we have this profound statement of truth (Oh how I long that people
would come to know and embrace this -- it is life changing for those who
would put mere man in between himself/herself and God.):
"For there is one God and one Mediator between God and men, the Man Christ
Jesus." 1 Timothy 2:5

I close with some thoughts on the purposes of His Incarnation for your
personal study and blessing:
To reveal the Father -- John 14:8-11
To do God's will -- Hebrews 10:5-9
To die for our sins -- 1Peter 3:18
To fulfill all righteousness -- Matthew 3:15
To reconcile the world -- 2 Corinthians 5:18-21
To become our High Priest -- Hebrews 7:24-28
To become our example -- 1 Peter 2:21-23

Thank you Father for Your gracious plan for drawing mankind back to
Yourself. Thank you Christ Jesus for coming to earth to rescue mankind.
Thank you Holy Spirit for Your work that prepares hearts to believe and
receive new life in Christ and reconciliation with God our Father. All
praise, honor and glory are Yours most Holy God now and forever. Amen