How is it possible for Christ to have two natures? Or to put it another way, how can Christ can be both man and God at the same time? The Bible doesn’t explain the details of how this is possible but it does make clear that Christ is both fully human and fully God.
Jesus is God
There are many verses that show that Jesus Christ is God. John 1:1 says that “The Word was God.” If you keep reading the rest of John, chapter 1, it becomes obvious that the Word being talked about is Jesus. In Romans 9:5, Paul says talks about “Christ, who is God over all.” And again in Colossians 1:15, it says that “Christ [is] the image of the invisible God.” Colossians 1:19 says about Christ that, “in him all the fullness of deity was pleased to dwell.”
Jesus is human
We can see clearly in the Bible that Jesus is God, and we also see that He was a real human person. Mary was a virgin when the Holy Spirit came upon her and conceived in her womb the Christ, the Son of God (Is. 7:14, Lk. 1:27-35, Mt. 1:18-25), yet without sin (Heb. 7:26). Christ was conceived spiritually through the Holy Spirit without any physical intercourse. During Jesus’ lifetime, we see that He did things that a normal man did, such as get tired (Mark 4:38), eat (Luke 24:43).
While it remains a mystery as how human nature and the divine nature could be united in Christ, it is clear from the Bible that Jesus Christ, being the eternal Son of God, became man and so was and continues to be God and man in two distinct natures, and one person, forever. When the Son took to Himself a true body and a reasonable soul in the incarnation, the Godhead and the manhood were inseparably joined together in one Person, without conversion, composition, or confusion.