This concept is one that has cause great debate over the years. It has even divided churches and was one of the many issues during the Reformation.
Some say that Jesus was always God that simply took on a human form. Some say he was fully man that was filled with the spirit of God. Neither of these can stand up to the gospel message however. The truth and the only truth that matches with the scriptures is that Jesus Christ was FULLY God but at the same time He was FULLY Man.
This reason this is critical is actually easier to grasp if you look at the opposite. If Jesus was not fully God, He could not make statements like “I and the Father are one.” (John 10:30), and “Have I been with you so long, and you still do not know me, Philip? Whoever has seen me has seen the Father. How can you say, ‘Show us the Father’? Do you not believe that I am in the Father and the Father is in me?” (John 14:9-10). In addition, the open of the Gospel of John says “In the beginning was the Word, and the Word was with God, and the Word was God. He was in the beginning with God. All things were made through him, and without him was not any thing made that was made.” (John 1:1-3) These statements can only be possible if Jesus is fully God.
Now let’s look at the possibility of Jesus not being fully man. Two striking issues stand out and they are the bookends to his ministry. Jesus begins with his temptation. When “Jesus was led up by the Spirit into the wilderness to be tempted by the devil” (Matt 4:1) this temptation would be meaningless if Jesus were NOT fully man.
The second is the end of His ministry, the crucifixion. Just before this, Jesus is fully man as He prays to His Father at the Garden in Gethsemane. “My Father, if it be possible, let this cup pass from me; nevertheless, not as I will, but as you will.” (Matt 26:39) This is clearly a man praying to God, asking in a human way to not have to go through what he was about to face, but in the end, submitting to the Father’s will.
You see, if Jesus were not fully God, then John 1:1-3 could not be accurate. He would have to be fully God for that scripture to be accurate. And if Jesus were not fully man, his temptation and eventually his sacrifice would have no meaning.
Just as we should never minimize the God aspects of Jesus, we should also never minimize the Man aspects of Jesus either.
Worship Jesus the Son of God and mimic Jesus the Son of Man.