One time Jesus asked his disciples who men said he was told that some thought he was John the Baptist and others thought he was Elijah or one of the other prophets. If he asked that question today there would be even more answers.
He was a fictional character invented by the gospel writers and he never really existed.
He was an ordinary human who was a very persuasive speaker and was able to convince others to believe the claims he made for himself.
He was a man who was in touch with God and received power from God to perform miracles.
He was the reincarnation of a great spiritual teacher who have lived many lives before.
All our knowledge of him comes from the Bible so that is where we must look if we want to find out who he really was.
John 1:1,2 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.
Verse 14 says,
And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth.
Those who believe he is the reincarnation of a great teacher are partly right because he did exist before his appearance here on earth. But they are wrong in referring to his coming as
reincarnation. He has always existed because he is God but he only took on human form one time.
A more detailed explanation of his identity is found in Colossians 1:15-20,
He is the image of the invisible God, the firstborn of all creation. For by him all things were created, in heaven and on earth, visible and invisible, whether thrones or dominions or rulers or authorities—all things were created through him and for him. And he is before all things, and in him all things hold together. And he is the head of the body, the church. He is the beginning, the firstborn from the dead, that in everything he might be preeminent. For in him all the fullness of God was pleased to dwell, and through him to reconcile to himself all things, whether on earth or in heaven, making peace by the blood of his cross.