Then said they unto Him, Who art Thou? And Jesus saith unto them, Even the same that I said unto you from the beginning.
They understood not that He spake to them of the Father.
I have many things to say and to judge of you: but He that sent Me is true; and I speak to the world those things which I have heard of Him.
What a different response the Pharisees would have received from Jesus if they had been asking sincerely, “Who art Thou?” But their question was not sincere. It was just another attempt to get Him to say something for which they could condemn Him. It was similar to saying, “Just who do you think you are?” with a sneering countenance and sarcasm in the voice.
Jesus was not dismayed. He answered them just the way He had been answering them. “I am Who I have said I am from the beginning.” Nothing new to add, no changes to make. They still didn’t understand that He spoke with the authority of the Father.
He went on to say, “I could point out all of your misbeliefs, your self-righteousness, your hatred of the Light, your pride, hypocrisy and unbelief. It is because of all these things that you will die in your sins.
“I am telling you the truth, and He that sent Me is true. What I say to you is what I have learned from Him.” (last two paragraphs are my own paraphrase)
It is no wonder they hated Him! He was daring to tell them to their faces what He saw in their hearts. No one had ever been so bold, and they didn’t like it. Not at all.