God twice plainly stated that Jesus Christ was His Son, once at His baptism, once at the "transfiguration":"Who is Jesus Christ?"
Answer: Unlike the question “Does God exist?” very few people question whether Jesus Christ existed. It is generally accepted that Jesus was truly a man who walked on the earth in Israel 2000 years ago. The debate begins when the subject of Jesus' full identity is discussed. Almost every major religion teaches that Jesus was a prophet or a good teacher or a godly man. The problem is that the Bible tells us that Jesus was infinitely more than a prophet, a good teacher, or a godly man.
C.S. Lewis in his book Mere Christianity writes the following:“I am trying here to prevent anyone from saying the really foolish thing that people often say about Him [Jesus Christ]:'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 a 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 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 up with any patronizing nonsense about his being a great human teacher. He has not left that option open to us. He did not intend to.”
So, who did Jesus claim to be? Who does the Bible say He is? First, let's look at Jesus’ words in John 10:30,“I and the Father are one.” At first glance, this might not seem to be a claim to be God. However, look at the Jews’ reaction to His statement,“‘We are not stoning you for any of these,’ replied the Jews,‘but for blasphemy, because you, a mere man, claim to be God’”(John 10:33). The Jews understood Jesus’ statement as a claim to be God. In the following verses, Jesus never corrects the Jews by saying,“I did not claim to be God.” That indicates Jesus was truly saying He was God by declaring,“I and the Father are one”(John 10:30). John 8:58 is another example:“‘I tell you the truth,’ Jesus answered,‘before Abraham was born, I am!’” Again, in response, the Jews took up stones in an attempt to stone Jesus (John 8:59). Jesus’ announcing His identity as “I am” is a direct application of the Old Testament name for God (Exodus 3:14). Why would the Jews again want to stone Jesus if He had not said something they believed to be blasphemous, namely, a claim to be God?
"3:16 And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw The Spirit Of God descending like a dove, and lighting upon him: 3:17 And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased."
"17:1 And after six days Jesus taketh Peter, James, and John his brother, and bringeth them up into an high mountain apart, 17:2 And was transfigured before them: and his face did shine as the sun, and his raiment was white as the light. 17:3 And, behold, there appeared unto them Moses and Elias talking with him.
17:4 Then answered Peter, and said unto Jesus, Lord, it is good for us to be here: if thou wilt, let us make here three tabernacles; one for thee, and one for Moses, and one for Elias. 17:5 While he yet spake, behold, a bright cloud overshadowed them: and behold a voice out of the cloud, which said, This is my beloved Son, in whom I am well pleased; hear ye him.