Here is what C.S. Lewis said about that possibility:
"I am trying here to prevent anyone saying the really foolish thing that people often say about Him: ‘I’m ready to accept Jesus as a great moral teacher, but I don’t accept His claim to be God.’ That is the one thing we must not say. A man who was merely a man and said the sort of things Jesus said would not be a great moral teacher. He would either be a lunatic-on a level with the man who says he is a poached egg-or else he would be the Devil of Hell. You must make your choice. Either this man was, and is, the Son of God: or else a madman or something worse. You can shut Him up for a fool, you can spit at Him and kill Him as a demon; or you can fall at His feet and call Him Lord and God. But let us not come with any patronising nonsense about His being a great human teacher. He has not left that open to us. He did not intend to."
CS Lewis, Mere Christianity, Book 2, Chapter 3, The Shocking Alternative
Who does the Bible say that Jesus is?
Here is an excerpt from chapter one of the book of John:
In the beginning was the Word, and the Word was with God, and the Word was God. He was with God in the beginning. Through him all things were made; without him nothing was made that has been made. In him was life, and that life was the light of men. the light shines in the darkness, but the darkness has not understood it. There came a man who was sent from God; his name was john. he came as a witness to testify concerning that light, so that through him all men might believe. He himself was not the light; he came only as a witness to the light. The true light that gives light to every man was coming into the world. He was in the world, and though the world was made through him, the world did not recognize him. He came to that which was his own, but his own did not receive him. yet to all who received him, to those who believed in his name, he gave the right to become children of God- children born not of natural descent, nor of human decision or a husband’s will, but born of God. The word became flesh and made his dwelling among us. We have seen his glory, the glory of the one and only, who came from the father, full of grace and truth. John 1:1-14 (NIV)
In summary: In the beginning was the Word … the Word was God … the Word became flesh and made his dwelling among us.
The Word was God. And, The Word became flesh. Therefore, God became flesh, thus the Bible says that Jesus is God.
Father, Son and Holy Spirit are all God … just as water, ice and steam are all H2O. Existing in three different forms does not change the identity. According to the Bible, which I believe, Jesus is God.
(this is reprinted from my website)