"The Jews then gathered around Him, and were saying to Him, "How long will You keep us in suspense? If You are the Christ, tell us plainly." Jesus answered them, "I told you, and you do not believe; the works that I do in My Father's name, these testify of Me. " John10:24-25
Has it ever struck you that at every turn, the Jews questioned Jesus about being the Messiah? They followed him from place to place to hear him teach and see the miracles he preformed, but always ended up asking him the same thing... "If You are the Christ, tell us plainly."
Throughout the entire scriptures, the proof of the prophet was the fulfillment of the word spoken. For a man to speak forth on behalf of the Lord, the word he spoke must accomplish the purpose to which it was spoken. God said in Isaiah 55:11, "So will My word be which goes forth from My mouth; It will not return to Me empty, without accomplishing what I desire, And without succeeding in the matter for which I sent it. " and again in Jeremiah 1:11, God told Jeremiah, "I am watching over my word to perform it" and lastly in Psalm 138:2, the Psalmist said, "You have magnified Your word according to all Your name. " or as the Amplified Bible says, "You have exalted above all else Your name and Your word and You have magnified Your word above all Your name!" So God places an importance on His word being fulfilled to the point that he watched over it to perform it because His name depends on it.
So as the people questioned Jesus about being the Christ, in most every situation he would answer by telling them, that the works he did in His Fathers name testified whether or not if he was the Messiah. (i.e. John10:25; John 5:36; John 10:38; Matthew 11:4; John 2:23; Matthew 13:17 ) To answer them plainly, might have satisfied them, but it wouldn't have satisfied Jesus, because the works that Jesus did was the evidence and necessary credentials that he was the Messiah sent and promised by God. Because every miracle, sign and wonder that Jesus preformed was a fulfillment of what the prophets had foretold the Messiah to be in the scriptures.
Isaiah prophesied that the blind eyes would be opened ( Isaiah 35:5 ) and when Jesus healed a man who had been born blind, he declared that he was the light of the world. ( John 9:5 ), when the Pharisees questioned the man blind from birth, asking him to testify about Jesus, all he said was, the "One thing I do know, that though I was blind, now I see." The man giving credit to Jesus opening his blind eyes.
Isaiah goes on to say, "Then will the eyes of the blind be opened and the ears of the deaf unstopped. Then the lame will leap like a deer, And the tongue of the mute will shout for joy" ( Isaiah 35:5-6 ) and when someone brought to Jesus one who was deaf and mute, Jesus put his figures into his ears and touched the mute's tongue with his saliva and said, "Be opened!" and it was done. Those who witnessed this were astonished saying, "He makes even the deaf to hear and the mute to speak." ( Matthew 15:29-31; Mark 7:31-37 ) The people testifying themselves that Jesus fulfilled Isaiah's prophesy.
Lastly, when the paralytic was brought to Jesus, he forgave his sins and then told him to take up his mat and walk, and when he arose glorifying God who had brought wholeness to his body, the crowds around who had witnessed said, "We have never seen anything like this!" ( Matthew 9:1-8; Mark 2: 1-12; Luke 5:17-26 ) They knew Jesus acted on God's behalf by what he did.
And fulfillment of what was prophesied about the Messiah was what happen as Jesus went from place to place opening blind eyes, healing the sick and bringing restoration to broken bodies and even raising the dead.
So when Jesus answered the people by saying, "the works that I do in My Father's name, these testify of Me" ( John10:25 ) he was more than answering their question to whether or not he was the Messiah, by performing God's word, he was removing all doubts completely. The works that he did, had God's signature all over them. In John 5: 39-40, Jesus rebuked the people, by saying "You search the Scriptures because you think that in them you have eternal life; it is these that testify about Me; and you are unwilling to come to Me so that you may have life."
It's a sad state when the people followed him from place to place watching what he did, still not recognizing that he was the Messiah, even when Jesus told them to believe in the miracles as proof that he was from God. So as we study the scriptures, we have a word for word account of everything Jesus did to perform what was spoken of through the law, the prophets and the Psalms so that we can without a doubt, believe in, rely on, trust in, cleave and adhere to Jesus as our Savior, our Messiah and our hope! Amen!