"Fully God, fully man" ... this not only makes no sense, but is not an idea of scripture. (100% + 100% = 200%)
There is not one place in all of scripture that indicates that Jesus the Christ is also "fully God". This type of dichotomy exists only in philosophy. And because the Bible, not the traditions and tenets of men, is the authority here, we can know which philosophies are misleading.
There are several worldly philosophies that orthodoxy has embraced that inhibit its millions of followers from seeing the truth. One of the primary fallacies in orthodoxy, be it Roman Catholic or mainstream Christianity, is that all men are inherently immortal, when the Bible teaches that man is mortal and can die permanently in the lake of fire. God GIVES immortality to those who believe, Rom 6:23, John 3:16. The Bible teaches us what happens when we die the first temporary death prior to the respective resurrections (an entire other topic, but bears significance in the facts of Jesus Christ), Eccles. 3:19-20, Rev. 20:4-5. The breath (ruach) of God returns to him when we die and we know nothing until we are resurrected in one of the respective resurrections, Ecc. 9:5, I Cor. 15:20-21, 15:50-53. David has not ascended, Acts 2:34. Only Jesus Christ has been raised to immortality by God and ascended to heaven to this very moment, John 3:13, which is why he is called the "firstborn from the DEAD", and the "firstfruits of the resurrection". No one else is raised to permanent life (immortality) until the return of Christ at the last trump, at which time the dead in Christ and those alive, will be changed (not before). I Cor. 15:20-22, 50-53
(So, the dead in all the graves we see are just that ... DEAD. No one is invisibly floating around in heaven, and conversely, no one is alive in conscious burning torture either. The final judgment hasn't even happened yet! ... several other topics here to discuss in another section)
The whole significance of Jesus Christ is that he willingly left heaven's glory as a servant of God (messenger of the covenant for one, Malachi 3:1), and willingly became an embryo in a human womb to become flesh and blood ... because God requires the shedding of blood (life for life!) for the remission of sins, Lev. 17:11, Heb. 9:22. This same Christ did no sin while he walked the earth as flesh and blood like we are, I Pet. 2:21-23. So, when he died, he was not subject to the death penalty (permanent death, Rom. 6:23) because he committed no sin on which to be judged by God, thus, he gained victory over permanent death, and instead was given permanent life by the Lifegiver Himself, God the Father, the ONLY inherently immortal One, I Tim. 6:15-16.
This is the doctrine of Jesus Christ, that he came in flesh and blood, like we are, II John 7-9, and because of that quality, died like we do, but was not subject to the permanent death penalty because he did no sin. He did not stay dead, or corrupt in the ground, but God raised him to life the third day, and then he ascended to heaven 50 days later. Jesus is the chief servant of God and is always subject to God because he is not God, I Cor. 15:2-28. And because of Jesus' high and special status, God says he is our lord and master, our brother and teacher, our mediator between ourselves and God, and our savior who willingly laid down his life and became the propitiation for the sins of the whole world, effective to those who believe ... but he is not God. We are to love, honor, and follow Jesus. But he is not the God of the first commandment that we are to have no other gods before.
So, one false idea leads to another. If one does not understand what the Bible teaches happens at death, then one can be lead astray by the "immortal soul" philosophy that enables yet another totally false idea that the Jesus is also THE God because he had immortality to begin with, making it all just some sort of pantomime ... but that's orthodoxy! Too bad orthodoxy deviated from the truth of scripture long ago, something the writers of the New Testament warned about.