Jesus is the most important person who has ever lived since he is the Savior, God in human flesh. He is not half God and half man. He is fully divine and fully man.
In other words, Jesus has two distinct natures:
divine and human.
Jesus is the Word who was God and was with God and was made flesh (John 1:1, 14).
This means that in the single person of Jesus he has both a human and divine nature, God and man. The divine nature was not changed when the Word became flesh (John 1:1, 14). Instead, the Word was joined with humanity (Col. 2:9). Jesus' divine nature was not altered.
Also, Jesus is not merely a man who "had God within Him," nor is he a man who "manifested the God principle." He is God in flesh, second person of the Trinity.
"The Son is the radiance of God's glory and the exact representation of his being, sustaining all things by his powerful word." (Heb. 1:3).
Jesus' two natures are not "mixed together" (Eutychianism), nor are they combined into a new God-man nature (Monophysitism). They are separate yet act as a unit in the one person of Jesus.
A doctrine that is related to the Hypostatic Union is the communicatio idiomatum (Latin for "communication of properties").
This is the teaching that the attributes of both the divine and human natures are ascribed to the one person of Jesus.
This means that the man Jesus could lay claim to the glory He had with the Father before the world was made (John 17:5), claim that He descended from heaven (John 3:13), and also claim omnipresence (Matt. 28:20).
All of these are divine qualities that are laid claim to by Jesus; therefore, the attributes of the divine properties were claimed by the person of Jesus.
One of the most common errors that non-Christian cults make is not understanding the two natures of Christ. For example, the Jehovah's Witnesses focus on Jesus' humanity and ignore His divinity. They repeatedly quote verses dealing with Jesus as a man and try to set them against Scripture showing that Jesus is also divine.
On the other hand, the Christian Scientists do the reverse. They focus on the Scriptures showing Jesus' divinity to the extent of denying His true humanity.
For a proper understanding of Jesus and, therefore, all other doctrines that relate to Him, His two natures must be properly understood and defined. Jesus is one person with two natures. This is why He would grow in wisdom and stature (Luke 2:52) and yet know all things (John 21:17). He is the Divine Word that became flesh (John 1:1, 14).
1 Tim. 2:5 says, "For there is one God, and one mediator also between God and men, the man Christ Jesus."
Right now, there is a man in heaven on the throne of God.
He is our advocate with the Father (1 John 2:1).
He is our Savior (Titus 2:13).
He is our Lord (Rom. 10:9-10).
He is Jesus.
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Colossians 1:13-20 Amplified Bible (AMP)
The Incomparable Christ
13 For He has rescued us and has drawn us to Himself from the dominion of darkness, and has transferred us to the kingdom of His beloved Son,
14 in whom we have redemption [because of His sacrifice, resulting in] the forgiveness of our sins [and the cancellation of sins’ penalty].
15 He is the exact living image [the essential manifestation] of the unseen God [the visible representation of the invisible],
the firstborn [the preeminent one, the sovereign, and the originator]
of all creation.
16 For [a]by Him all things were created in heaven and on earth, [things] visible and invisible, whether thrones or dominions or rulers or authorities; all things were created and exist through Him [that is, by His activity] and for Him.
17 And He Himself existed and is before all things, and in Him all things hold together. [His is the controlling, cohesive force of the universe.]
18 He is also the head [the life-source and leader] of the body, the [b]church; and He is the beginning, [c]the firstborn from the dead, so that He Himself will occupy the first place [He will stand supreme and be preeminent] in everything.
19 For it pleased the Father for all the fullness [of deity—the sum total of His essence, all His perfection, powers, and attributes] to dwell [permanently] in Him (the Son),
20 and through [the intervention of] the Son to reconcile all things to Himself, making peace [with believers] through the blood of His cross; through Him, [I say,] whether things on earth or things in heaven.
