Do you mean prove it as Jesus tried to prove it the Jews who had him crucified for blaspheme.? He didnt get very far in his proof did he? You are no different, only God Himself can open up His truths to you the same way He did in Jesus in Matt 3:16. Those who had him crucified from lack in proof never got Gods proof -- as you are seeking from ne -- either did they?
Jesus couldnt prove who he was no more than I can in the Father, that is the work of the Father in you, all Jesus could do or all I can do is present to you what it is to be in the Father to be one in Him and He in you as one yourself.
Jesus was clear that in that day ye shall ask me nothing but go to the Father for yourself and He will give it you. Only God can give you the truth, Not Jesus not I nor anyone else, that comes only by God Himself be in you as He was in Christ Jesus.
Jesus WAS the proof of God - his God. The Father who is light was in Jesus and shined through him. All who rejected this light rejected God.
God the Father is light and Jesus was
the light of the world because the Father was abiding in him doing the works. And indeed, true disciples of Jesus are
the light of the world too. Matthew 5:14. Not because of good deeds they dream up to do that they declare to be good in God's sight. True disciples are led by the Spirit of God to do only God's will. God
in them decides what they do. And that is why they are the light of God,
the proof of God. God Himself in them is that light. Many reject the proof God which provides because they are evil and love darkness rather than light. Many routinely visit this forum pretending to be light just as the Pharisees did. The proof of God which HE provided is not a word salad; it is the lives of those in whom He lives, the light of the world.