3 Bible Verses about Incredulity

Thomas, one of the twelve--surnamed 'the Twin' --was not among them when Jesus came.

They brought him to the Pharisees--the man who had been blind. Now the day on which Jesus made the clay and opened the man's eyes was the Sabbath. So the Pharisees renewed their questioning as to how he had obtained his sight. "He put clay on my eyes," he replied, "and I washed, and now I can see."read more.
This led some of the Pharisees to say, "That man has not come from God, for he does not keep the Sabbath." "How is it possible for a bad man to do such miracles?" argued others. And there was a division among them. So again they asked the once blind man, "What is your account of him? --for he opened your eyes." "He is a Prophet," he replied. The Jews, however, did not believe the statement concerning him--that he had been blind and had obtained his sight--until they called his parents and asked them, "Is this your son, who you say was born blind? How is it then that he can now see?" "We know," replied the parents, "that this is our son and that he was born blind; but how it is that he can now see or who has opened his eyes we do not know. Ask him himself; he is of full age; he himself will give his own account of it." Such was their answer, because they were afraid of the Jews; for the Jews had already settled among themselves that if any one should acknowledge Jesus as the Christ, he should be excluded from the synagogue. That was why his parents said, "He is of full age: ask him himself." A second time therefore they called the man who had been blind, and said, "Give God the praise: we know that that man is a sinner." "Whether he is a sinner or not, I do not know," he replied; "one thing I know--that I was once blind and that now I can see." "What did he do to you?" they asked; "how did he open your eyes?" "I have told you already," he replied, "and you did not listen to me. Why do you want to hear it again? Do you also mean to be disciples of his?" Then they railed at him, and said, "You are that man's disciple, but we are disciples of Moses. We know that God spoke to Moses; but as for this fellow we do not know where he comes from." "Why, this is marvellous!" the man replied; "you do not know where he comes from, and yet he has opened my eyes! We know that God does not listen to bad people, but that if any one is a God-fearing man and obeys Him, to him He listens. From the beginning of the world such a thing was never heard of as that any one should open the eyes of a man blind from his birth. Had that man not come from God, he could have done nothing." "You," they replied, "were wholly begotten and born in sin, and do *you* teach *us*?" And they put him out of the synagogue. Jesus heard that they had done this. So having found him, He asked him, "Do you believe in the Son of God?" "Who is He, Sir?" replied the man. "Tell me, so that I may believe in Him." "You have seen Him," said Jesus; "and not only so: He is now speaking to you." "I believe, Sir," he said. And he threw himself at His feet. "I came into this world," said Jesus, "to judge men, that those who do not see may see, and that those who do see may become blind." These words were heard by those of the Pharisees who were present, and they asked Him, "Are *we* also blind?" "If you were blind," answered Jesus, "you would have no sin; but as a matter of fact you boast that you see. So your sin remains!"

But we should be glad to hear from you what it is that you believe; for as for this sect all we know is that it is everywhere spoken against." So they arranged a day with him and came to him in considerable numbers at the house of the friends who were entertaining him. And then, with solemn earnestness, he explained to them the subject of the Kingdom of God, endeavouring from morning till evening to convince them about Jesus, both from the Law of Moses and from the Prophets. Some were convinced; others refused to believe.read more.
Unable to agree among themselves, they at last left him, but not before Paul had spoken a parting word to them, saying, "Right well did the Holy Spirit say to your forefathers through the Prophet Isaiah: "'Go to this people and tell them, you will hear and hear, and by no means understand; and will look and look, and by no means see. For this people's mind has grown callous, their hearing has become dull, and their eyes they have closed; to prevent their ever seeing with their eyes, or hearing with their ears, or understanding with their minds, and turning back, so that I might cure them.' "Be fully assured, therefore, that this salvation--God's salvation--has now been sent to the Gentiles, and that they, at any rate, will give heed." No translation