Did Jesus Christ true God and true man, become a human person?
The Second Person, the Eternal Son, God from God, took our human nature into an indestructible bond with His divinity and was born of the Virgin Mary, who, with Joseph His legal father, named Him Jesus.
Our Lord Jesus Christ is the Eternal Son of the Eternal Father, now incarnate. Thus, Jesus is a Divine Person, just as the Father is a Divine Person. Though Christ had a human mother, He did not have a human Father. He is a Divine Person, not a human person, as you and I are, having both mother and father. Jesus has our human nature from His mother, but He is a divine Person.
Jesus is consubstantial with His Father. Jesus is consubstantial with His mother.
Mary gave birth to the Divine Person, Jesus. Therefore, since she is the mother of a Divine Person, and not just of His human nature, she is rightly called Mother of God, as defined by the Council of Ephesus in 431.
We do not make errors about this, as Nestorius and the Nestorians, who thought wrongly that Jesus was two persons, one divine and one human. The Council of Ephesus in 431 settled this.
The Council of Chalcedon in 451 further clarified that Jesus has two distinct natures, Divine and human, and that these two natures are inseparably joined in one Divine person while not being confused with each other.
Neither do we fall into the error of Monophysitism, which was a heretical overreaction to Nestorianism. Eutyches, sharply reacting to the heresy of Nestorius that Christ was effectively two persons with human and divine natures, asserted that Christ was one person having one nature, a fusion of human and divine in some way. In Greek, “one” mono, and “nature” physis gives us Monophysitism.
There were also Ebionites and Adoptionists who thought that Christ was merely human but was adopted by God for a great purpose. But I have answered the question and we don’t have to deal with them.
Although… I wonder if we don’t have quite a few de facto Ebionites and Adoptionists in our pulpits and chanceries. I wonder. That would explain a lot of liturgical choices, certain suggestions about who can receive the Eucharist, etc. Sometimes you will hear modern day heretics or people in serious error float the notion that Jesus didn’t really know who He was, slowly figured things out, blah blah, which comes pretty close to a denial of His divine nature. So, what would Mass be? What would the Eucharist be? Adoptionism, a 2nd century heresy, asserted that Jesus was merely a human man adopted as God’s Son sometimes along the way, for example, at his baptism. Ebionites were Jewish Christians who thought Jesus was the Messiah but denied His divinity. These heretics thought that Jesus was a human person.
Don’t be an Ebionite!
Jesus is a Divine Person, who still has two natures, Divine and human. Jesus is a Divine Person, not a human person. He is a Divine person who shares our humanity.
As the Catechism of the Catholic Church states, “Jesus Christ is true God and true man, in the unity of his divine person; for this reason he is the one and only mediator between God and men.”